The Amish: a naturalistic laboratory for epidemiologic and genetic research.
D004812:Epidemiologic Methods; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology* / Q000235:genetics; D010375:Pedigree; D010414:Pennsylvania; D012107:Research Design