Time to onset of action of vardenafil: a retrospective analysis of the pivotal trials for the orodispersible and film-coated ...
Porst H et al. (2006) Extended duration of efficacy of Vardenafil when taken 8 hours before intercourse: a randomized, double-blind, placebo-controlled study. Eur Urol 50: 1086–1095 For many ...