title: A twin methodology for the study of genetic and environmental control of variation in human smoking behavior.
mesh_terms: D000328:Adult; D000368:Aged; D003071:Cognition; D004777:Environment; D005190:Family; D005260:Female; D005787:Gene Frequency; D005819:Genetic Markers; D005821:Genetic Techniques; D005824:Genetics, Behavioral; D005838:Genotype; D006801:Humans; D008297:Male; D008433:Mathematics; D008499:Medical Records; D008875:Middle Aged; D008954:Models, Biological; D010552:Personality Assessment; D010641:Phenotype; D011110:Polymorphism, Genetic; D011247:Pregnancy; D012907:Smoking / Q000523:psychology; D011795:Surveys and Questionnaires; D013548:Sweden; D014427:Twins / Q000523:psychology
chemical_list: D005819:Genetic Markers