Sildenafil Citrate-Restored eNOS and PDE5 Regulation in Sickle Cell Mouse Penis Prevents Priapism Via Control of Oxidative/Nitrosative Stress Bivalacqua, Trinity J. ; Musicki, Biljana ; Hsu, Lewis L. ; Berkowitz, Dan E. ; Champion, Hunter C. ; Burnett, Arthur L. Abstract Publication: PLoS ONE Pub Date: July 2013 DOI: 10.1371/journal.pone.0068028 Bibcode: 2013PLoSO...868028B