Relationships among pain, depression, and sleep alterations in Parkinson's disease.
D000368:Aged; D003866:Depressive Disorder / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D010146:Pain / Q000523:psychology*; D010300:Parkinson Disease / Q000523:psychology*; D011581:Psychological Tests; D011597:Psychomotor Performance; D012893:Sleep Wake Disorders / Q000523:psychology*