title: Twin environments and psychiatric disorders.
mesh_terms: D000293:Adolescent; D002032:Bulimia; D002648:Child; D005260:Female; D006801:Humans; D012931:Social Environment; D018433:Twin Studies as Topic; D014429:Twins, Dizygotic / Q000523:psychology*; D014430:Twins, Monozygotic / Q000523:psychology*