title: Two "new" autosomal recessive mental retardation syndromes observed among the Amish.
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D003241:Consanguinity; D003878:Dermatoglyphics; D003937:Diagnosis, Differential; D004314:Down Syndrome / Q000175:diagnosis; D005006:Ethnicity; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000235:genetics*; D008297:Male; D010375:Pedigree; D013577:Syndrome