title: A Danish twin study of manic-depressive disorders.
mesh_terms: D000367:Age Factors; D000368:Aged; D001714:Bipolar Disorder / Q000235:genetics*; D003718:Denmark; D003863:Depression / Q000235:genetics; D004200:Diseases in Twins; D005260:Female; D005823:Genetics; D006801:Humans; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D011618:Psychotic Disorders / Q000235:genetics; D012737:Sex Factors; D013997:Time Factors; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic