Family patterns in longevity and longevity patterns of the family.
D000328:Adult; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D004467:Economics; D005190:Family; D006801:Humans; D008136:Longevity; D008297:Male; D008404:Massachusetts; D011158:Population Growth; D011897:Random Allocation; D012424:Rural Population; D012737:Sex Factors; D012801:Sibling Relations