1Ayta IA,McKinlay JB,Krane RJ.The likely worldwide increase in erectile dysfunction between 1995 and 2025 and some possible policy consequences.BJU Int,1999,84 (1):502.
2Keating GM,Scott LJ.Spotlight on vardenafil in erectile dysfunction.Drugs Aging,2004,21(2):135.
3Padma-Nathan H,Montorsi F,Giuliano F,et al.Vardenafil restores erectile function to normal range in men with erectile dysfunction.J Sex Med,2007,4(1):152.
4S I Gamidov,D V Shcherbakov,R A Tkhagapsoyeva,et al.Influence of regular use of vardenafil on endothelial and erectile functions in patients with arteriogenic erectile dysfunction.Therapeutic Archives,2009,10.
5Al-Shaiji TF,Brock GB.Phosphodiesterase type 5 inhibitors for the management of erectile dysfunction:preference and adherence to treatment.Curr Pharm Des,2009,15(30):3486.
7J.Zumbé,H.Porst,F.Sommer,et al.Comparable Efficacy of Once-Daily Versus On-Demand Vardenafil in Men with Mild-to-Moderate Erectile Dysfunction:Findings of the RESTORE Study.European Urology,54(1):204.
8Kamp S,Ott R,Hatzinger M,et al.Decrease of nocturnal penile tumescence due to REM-sleep deprivation in young healthy males:Young,healthy-impotent?.European Urology(Suppl),2004,3(2):26.
