020 Regulation of Sphingosine-1-Phosphate (S1P) Signaling Pathway in Rats and Humans and Alterations in Response to Pathologically-Induced Erectile Dysfunction. (1st May 2016) - Zhang, X.; Ying, J.; Kanika, N.; Tong, Y.; Villegas, G.; Melman, A.; DiSanto, M.