Received: December 30, 2010; Received in revised form: February 17, 2011; Accepted: March 22, 2011; Published Online: April 18, 2011 Melatonin protects human spermatozoa from apoptosis via melatonin receptor– and extracellular signal–regulated kinase-mediated pathways Javier Espino, M.Sc., Águeda Ortiz, B.Sc., Ignacio Bejarano, M.Sc., Graciela M. Lozano, Ph.D., Fabian Monllor, B.Sc., Juan F. García, M.D., Ana […] Read more…