HALLERMAN-STREIFF SYNDROME
                                    
                                    See:  Craniofacial Disorders; Ectodermal
                                    Dysplasias; Short Stature
                                    
                                     
                                    
                                     
                                    
                                    HALLERVORDEN-SPATZ
                                    SYNDROME
                                    
                                    Halervorden-Spatz Syndrome
                                    Association
                                    
                                    http://www.hssa.org
                                    
                                     
                                    
                                     
                                    
                                    HEAD INJURY
                                    
                                    See Brain Injury
                                    
                                     
                                    
                                     
                                    
                                    HEARING IMPAIRMENTS
                                    
                                    Alexander Graham Bell
                                    Association for the Deaf and Hard of Hearing
                                    
                                    http://www.agbell.org
                                    
                                     
                                    
                                    American Society for Deaf
                                    Children
                                    
                                    http://www.deafchildren.org
                                    
                                     
                                    
                                    American Speech, Language,
                                    Hearing Association
                                    
                                    http://www.asha.org
                                    
                                     
                                    
                                    Auditory-Verbal International
                                    
                                    http://www.auditory-verbal.org
                                    
                                     
                                    
                                    Deafnes Research Foundation
                                    
                                    http://www.hearinghealth.org
                                    
                                     
                                    
                                    Gallaudet University
                                    
                                    http://www.gallaudet.edu
                                    
                                     
                                    
                                    John Tracy Clinic for
                                    Preschool Deaf Children
                                    
                                    http://www.johntracyclinic.org
                                    
                                     
                                    
                                    Lead Line
                                    
                                    http://www.hei.org
                                    
                                     
                                    
                                    National Association for the
                                    Deaf
                                    
                                    http://nad.com
                                    
                                     
                                    
                                    National Deaf Education
                                    Network and Clearinghouse
                                    
                                    http://clerccenter.gallaudet.edu
                                    
                                     
                                    
                                    SEE Center for the
                                    Advancement of Deaf Children
                                    
                                    http://www.seecenter.org
                                    
                                     
                                    
                                    SHHH: Self Help for Hard of
                                    Hearing People
                                    
                                    http://www.shhh.org
                                    
                                     
                                    
                                    Telecommunications for the
                                    Deaf, Inc.
                                    
                                    http://www.tdi-online.org
                                    
                                     
                                    
                                    The Learning to Listen
                                    Foundation
                                    
                                    http://www.learningtolisten.org
                                    
                                     
                                    
                                    National Cued Speech Association
                                    (NCSA)
                                    
                                    http://www.cuedspeech.org
                                    
                                     
                                    
                                     
                                    
                                    HEART DISORDERS
                                    
                                    American Heart Association
                                    
                                    http://www.americanheart.org
                                    
                                     
                                    
                                    CHASER:  Congenital Heart AnomaliesSupport, Education,
                                    & Resources, Inc
                                    
                                    http://www.csun.edu/~hfmth006/chaser
                                    
                                     
                                    
                                     
                                    
                                    HEMIHYPERTROPHY
                                    
                                    See:  Beckwith-Wiedeman Syndrome
                                    
                                     
                                    
                                     
                                    
                                    HEMIPLEGIA, ALTERNATING
                                    
                                    See also:  Epilepsy; Seizure Disorders
                                    
                                     
                                    
                                    International Foundation for
                                    Alternating Hemiplegia of Childhood
                                    
                                    http://www.ahckids.org
                                    
                                     
                                    
                                     
                                    
                                    HEMISPHERECTOMY
                                    
                                    See:  Rasmussen Syndrome
                                    
                                     
                                    
                                     
                                    
                                    HEMOLYTIC-UREMIC SYNDROME
                                    
                                    See:  Kidney Disorders
                                    
                                     
                                    
                                     
                                    
                                    HEMOPHILIA
                                    
                                    National Hemophilia
                                    Foundation
                                    
                                    http://www.hemophilia.org
                                    
                                     
                                    
                                    World Federation of
                                    Hemophilia
                                    
                                    http://www.wfh.org
                                    
                                     
                                    
                                     
                                    
                                    HEMORRHAGIC
                                    TELANGIECTASIA, HEREDITARY (hht)
                                    
                                    Hereditary Hemorrhagic
                                    Telangiectasia (HHT) Foundation International Inc.
                                    
                                    http://www.hht.org
                                    
                                     
                                    
                                     
                                    
                                    HEPATOPHOSPHORYLASE
                                    DEFICIENCY GLYCOGENOSIS
                                    
                                    See:  Glycogen Storage Diseases; Muscular
                                    Dystrophy
                                    
                                     
                                    
                                     
                                    
                                    HERMANSKY-PUDLAK SYNDROME
                                    
                                    See also:  Albinism & Hypopigmentation; Visual
                                    Impairments
                                    
                                     
                                    
                                    Hermansky-Pudlak Syndrome
                                    Network Inc.
                                    
                                    http://www.hpsnetwork.org
                                    
                                     
                                    
                                     
                                    
                                    HERNIA, DIAPHRAGMATIC
                                    
                                    CHERUBS The Association of Congenital Diaphragmatic Hernia
                                    Research, Advocacy, and Support
                                    
                                    http://www.cherubs-cdh.org
                                    
                                     
                                    
                                     
                                    
                                    HIRSCHSPRUNG DISEASE
                                    
                                    See:  Intestinal Pseudo-Obstruction Syndrome
                                    
                                     
                                    
                                     
                                    
                                    HISTIOCYTOSIS
                                    
                                    See also:  Growth Disorders; liver Disorders; Lung
                                    Diseases; Pituitary Tumors
                                    
                                     
                                    
                                    Histiocytosis Association of
                                    America
                                    
                                    http://www.histio.org
                                    
                                     
                                    
                                     
                                    
                                    HIV
                                    
                                    See:  AIDS
                                    
                                     
                                    
                                     
                                    
                                    HODGKIN DISEASE
                                    
                                    See: Leukemia
                                    
                                     
                                    
                                     
                                    
                                    HOLOPROSENCEPHALY
                                    
                                    See also:  Craniofacial disorders
                                    
                                     
                                    
                                    The Carter Centers for Brain
                                    Research in Holoprosencephaly and Related Malformations
                                    
                                    http://hpe.standford.edu
                                    
                                     
                                    
                                     
                                    
                                    HUNTER SYNDROME
                                    
                                    HURLER SYNDROME
                                    
                                    HURLER / SCHEIE SYNDROME
                                    
                                    See:  Mucopolysaccharidosis: Tay-Sachs Disease
                                    
                                     
                                    
                                     
                                    
                                    HUTCHINSON-GILFORD
                                    SYNDROME
                                    
                                    See:  Progeria
                                    
                                     
                                    
                                     
                                    
                                    HUTCHINSON-WEBER-PEUTZ
                                    SYNDROME
                                    
                                    See:  Colon Cancer, Hereditary; Polyposis
                                    
                                     
                                    
                                     
                                    
                                    HYCROCEPHALUS
                                    
                                    Hydrocephalus Association
                                    
                                    http://www.neurosurgery.mgh.harvard.edu/ha/
                                    
                                     
                                    
                                    National Hydrocephalus
                                    Foundation
                                    
                                    http://www.nhfonline.org
                                    
                                     
                                    
                                     
                                    
                                    HYCROCEPHALUS, OBSTRUCTIVE
                                    
                                    See:  Dandy-Walker Syndrome
                                    
                                     
                                    
                                     
                                    
                                    HYPERCALCEMIA SYNDROME,
                                    INFANTILE, IDIOPATHIC
                                    
                                    See:  Williams Syndrome
                                    
                                     
                                    
                                     
                                    
                                    HYPERCALCEMIA-SUPRAVALVAR
                                    AORTIC STENOSIS
                                    
                                    See:  Williams Syndrome
                                    
                                     
                                    
                                     
                                    
                                    HYPERLEXIA
                                    
                                    See:  Autism
                                    
                                     
                                    
                                    American Hyperlexia
                                    Association
                                    
                                    http://www.hyperlexia.org
                                    
                                     
                                    
                                     
                                    
                                    HYPERTELORISM /
                                    HYPOSPADIUS SYNDROMES
                                    
                                    See:  Opitz Syndrome
                                    
                                     
                                    
                                     
                                    
                                    HYPERTHYROID MYOPATHY
                                    
                                    See:  Muscular Dystrophy; Thyroid Disorder
                                    
                                     
                                    
                                     
                                    
                                    HYPOMYELINATION
                                    
                                    See:  Myelin Disorders
                                    
                                     
                                    
                                     
                                    
                                    HYPOPARATHYROIDISM
                                    
                                    See also:  Panathyroid Disorders
                                    
                                     
                                    
                                    Hypoparathyroidism
                                    Association, Inc.
                                    
                                    http://www.hypoparathyroidism.org
                                    
                                     
                                    
                                     
                                    
                                    HYPOPLASIA OF THE CORPUS
                                    CALLOSUM
                                    
                                    See:  Agenesis of the Corpus Callosum
                                    
                                     
                                    
                                     
                                    
                                    HYPOPLASTIC ANEMIA
                                    
                                    See:  Anemia, Aplastic
                                    
                                     
                                    
                                     
                                    
                                    HYPOPLASTIC LEFT HEART
                                    SYNDROME
                                    
                                    See:  Heart Disorders
                                    
                                     
                                    
                                     
                                    
                                    HYPOTHYROID MYOPATHY
                                    
                                    See:  Muscular Dystrophy; Thyroid Disorders
                                    
                                     
                                    
                                     
                                    
                                    HYPOTONIA, BENIGN
                                    CONGENITAL
                                    
                                    See:  Spinal Muscular Atrophy