Ramezani M, Ruskey JA, Martens K, Kibreab M, Javer Z, Kathol I, Hammer T, Cheetham J, Leveille E, Martino D, Sarna JR, Gan-Or Z, Pfeffer G, Ismail Z and Monchi O. Association between BDNF Val66Met polymorphism and mild behavioral impairment in patients with Parkinson’s disease. Frontiers in Neurology. 2021. PubMed