6Allen D,Seftel,Steven K,et al.The efficacy and safety of tadalafil in United States and Puerto Rican men with erectile dysfunction.The Journal of Urology,2004,172(2):652-657.
7AF De Rose,F Gallo,G Carmignani.Evaluation of sexual activity in patients treated with tadalafil:a randomized prospective placebocontrolled trial.International Journal of Impotence Research,2005(17):76-79.
8Ying Li GUO,Ji Chuan ZHU,Tian Ming PAN.Efficacy and safety of on-demand tadalafil for the treatment of erectile dysfunction in South-East Asian men.International Journal of Urology,2006(13):721-727.
9Rajfer J,Aliotta PJ,Steidle CP,et al.Tadalafil dosed once a day in men with erectile dysfunction:a randomized,double-blind,placebo-controlled study in the US.International Journal of Impotence Research,2007(19):95-103.
10Koichi Nagao,Yasusuke Kimoto,Ken Marumo,et al.Efficacy and safety of tadalafil 5,10,and 20 mg in japanese men with erectile dysfunction:results of a multicenter,randomized,double-blind,placebo-controlled study.Urology,2006,68:845-851.
