[1] Univ Virginia, Dept Psychiat & Neurobehav Sci, Charlottesville, VA 22903 USA
[2] Hudson Valley Urol, Poughkeepsie, NY USA
[3] Alvarado Hosp, San Diego, CA USA
[4] Johns Hopkins Univ, Maryland Ctr Sexual Hlth, Sch Med, Lutherville Timonium, MD USA
[5] Univ Pavia, Res Ctr Reprod Med, IRCCS, Maugeri Fdn, I-27100 Pavia, Italy
[6] Boehringer Ingelheim Pharmaceut Inc, Ridgefield, CT 06877 USA
[7] Boehringer Ingelheim SAS, Reims, France