Parkinson's disease in twins.
D000293:Adolescent; D002648:Child; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000235:genetics* / Q000523:psychology; D010551:Personality; D011247:Pregnancy; D012907:Smoking; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic