three hundred patients with impotence underwent papaverine ( 9-60 mg ) induced pbfs at the university of california school of medicine , san francisco ( ucsf ) , u.s.a. and another 80 patients with impotence received pge1-induced ( 20 micrograms ) pbfs at veterans general hospital-taichung ( vgh-tc ) , r.o.c .
C0006754
california
C0041703
u.s.a