title: Of genes and twins.
authors.forename: Kenneth S
authors.initials: KS
authors.lastname: Kendler
mesh_terms: D004200:Diseases in Twins; D006801:Humans; D001523:Mental Disorders / Q000453:epidemiology / Q000235:genetics*; D011110:Polymorphism, Genetic; D012107:Research Design; D012307:Risk Factors