title: Meta-analysis of observational studies: the case of rapid-cycling bipolar disorder.
authors.forename: S Nassir
authors.initials: SN
authors.lastname: Ghaemi
authors.forename: Federico
authors.initials: F
authors.lastname: Soldani
mesh_terms: D001714:Bipolar Disorder / Q000145:classification / Q000188:drug therapy*; D006801:Humans; D015201:Meta-Analysis as Topic; D019370:Observation