Enhanced expression of hypersensitive alpha4* nAChR in adult mice increases the loss of midbrain dopaminergic neurons. - Schwarz J; Schwarz SC; Dorigo O; Stützer A; Wegner F; Labarca C; Deshpande P; Gil JS; Berk AJ; Lester HA (FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 2006)