Brain-derived neurotrophic factor-deficient mice exhibit a hippocampal hyperserotonergic phenotype. by Guiard, B, David, D, Deltheil, T, Chenu, F, Le Maître, E, Renoir, T, Leroux-Nicollet, I, Sokoloff, P, Lanfumey, L, Hamon, M, Andrews, A, Hen, R, Gardier, A