Nitric oxide and ERK/MAPK mediation of estrous behavior induced by GnRH, PGE2 and db-cAMP in rats - Gonzalez-Flores, O; Gomora-Arrati, P; Garcia-Juarez, M; Gomez-Camarillo, M A; Lima-Hernandez, F J; Beyer, C; Etgen, A M (Physiol Behav, 2009)