Tramontina, J Val66met polymorphism and serum brain-derived neurotrophic factor levels in bipolar disorder. [electronic resource] - Molecular psychiatry Mar 2007 - 230-1 p. digital Publication Type: Comparative Study; Letter ISSN: 1359-4184 Standard No.: 10.1038/sj.mp.4001941 doi Subjects--Topical Terms: Bipolar Disorder--bloodBrain-Derived Neurotrophic Factor--bloodHumansMethionine--geneticsPolymorphism, Genetic--geneticsValine--genetics