Sexual activity in middle to later life.
Goodson
Patricia
P
D000368:Aged; D000375:Aging / Q000502:physiology*; D003430:Cross-Sectional Studies; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D012725:Sexual Behavior / Q000706:statistics & numerical data*; D014481:United States