title: Cigarette smoking, use of alcohol, and leisure-time physical activity among same-sexed adult male twins.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000428:Alcohol Drinking; D000704:Analysis of Variance; D004198:Disease Susceptibility; D005260:Female; D005387:Finland; D005824:Genetics, Behavioral; D006801:Humans; D007899:Leisure Activities; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D012907:Smoking; D014427:Twins