title: Chronological parameters, twin studies, and mental diseases.
mesh_terms: D000367:Age Factors; D000368:Aged; D000375:Aging; D000818:Animals; D001714:Bipolar Disorder / Q000235:genetics; D002875:Chromosomes; D004200:Diseases in Twins; D004314:Down Syndrome / Q000401:mortality; D004331:Drosophila melanogaster; D005260:Female; D005838:Genotype; D006716:Homosexuality / Q000235:genetics; D006801:Humans; D006816:Huntington Disease; D066298:In Vitro Techniques; D001523:Mental Disorders / Q000235:genetics*; D009154:Mutation; D012189:Retrospective Studies; D012559:Schizophrenia / Q000235:genetics; D012729:Sex Chromosome Aberrations; D013997:Time Factors