Delayed speech. Developmental mutism.
D001321:Autistic Disorder / Q000150:complications; D001925:Brain Damage, Chronic / Q000175:diagnosis; D002675:Child, Preschool; D002658:Developmental Disabilities; D003937:Diagnosis, Differential; D004200:Diseases in Twins; D004644:Emotions; D006311:Hearing Disorders / Q000175:diagnosis; D006639:Histidine / Q000652:urine; D006801:Humans; D008607:Intellectual Disability / Q000175:diagnosis; D009155:Mutism / Q000175:diagnosis; D010287:Parent-Child Relations; D012561:Schizophrenia, Childhood / Q000175:diagnosis; D013064:Speech Disorders / Q000209:etiology; D014705:Verbal Behavior
D006639:Histidine