1 "Viagra is well tolerated by subjects with stable angina and erectile dysfunction during incremental treadmill exercise" 3 : 25-, 2002
2 "Vardenafil:update on clinical experience" 14 : 65-69, 2002
3 "Vardenafil (Levitra) Clinical Trial Group. Safety and efficacy of vardenafil in patients with erectile dysfunction: result of a bridging study in Japan" 1 : 515-524, 2004
4 "Understanding erectile dysfunction medication preference studies" 14 : 367-373, 2004
5 "The worldwide prevalence and epidemiology of erectile dysfunction" 12 : 6-11, 2000
6 "The efficacy and safety of tadalafil:an update" 93 : 1276-1281, 2004
7 "Switching patients with erectile dysfunction from sildenafil citrate to tadalafil results of a European muticenter open-label study of patient preference" 25 : 2724-2737, 2003
8 "Sildenafil versus the vacuum erection device:patient preference" 166 : 1779-1781, 2001
9 "Prospective, randomized, crossover comparison of sublingual apomorphine (3 mg) with oral sildenafil (50 mg) for male erectile dysfunction" 172 : 2347-2349, 2004
10 "Preference for oral sildenafil or intracavernosal injection in patients with erectile dysfunction already using intracavernosal injection for >1 year" 92 : 277-280, 2003
1 "Viagra is well tolerated by subjects with stable angina and erectile dysfunction during incremental treadmill exercise" 3 : 25-, 2002
2 "Vardenafil:update on clinical experience" 14 : 65-69, 2002
3 "Vardenafil (Levitra) Clinical Trial Group. Safety and efficacy of vardenafil in patients with erectile dysfunction: result of a bridging study in Japan" 1 : 515-524, 2004
4 "Understanding erectile dysfunction medication preference studies" 14 : 367-373, 2004
5 "The worldwide prevalence and epidemiology of erectile dysfunction" 12 : 6-11, 2000
6 "The efficacy and safety of tadalafil:an update" 93 : 1276-1281, 2004
7 "Switching patients with erectile dysfunction from sildenafil citrate to tadalafil results of a European muticenter open-label study of patient preference" 25 : 2724-2737, 2003
8 "Sildenafil versus the vacuum erection device:patient preference" 166 : 1779-1781, 2001
9 "Prospective, randomized, crossover comparison of sublingual apomorphine (3 mg) with oral sildenafil (50 mg) for male erectile dysfunction" 172 : 2347-2349, 2004
10 "Preference for oral sildenafil or intracavernosal injection in patients with erectile dysfunction already using intracavernosal injection for >1 year" 92 : 277-280, 2003
11 "Inhibition of cyclic GMP hydrolysis in human corpus cavernosum smooth muscle cells by vardenafil,a novel selective phosphodiesterase type 5 inhibitior" 69 : 2249-2256, 2001
12 "Erectile dysfunction: comparision of efficacy and side effects of the PDE-5 inhibitors sildenafil, vardenafil and tadalafil" 7 : 435-446, 2002
13 "Comparison of clinical trials with sildenafil,vardenafil and tadalafil in erectile dysfunction" 6 : 75-84, 2005
14 "Cardiovascular profile of Tadalafil, a new PDE5 inhibitor" 167 : 176-, 2002
15 "A muticenter, randomized, double-blind, crossover study of patient preference for tadalafil 20 mg or sildenafil citrate 50 mg during initiation of treatment for erectile dysfunction" 25 : 2709-2723, 2003
16 "A multicenter, randomized, double-bline, crossover study to evaluate patient preference between tadalafil and sildenafil" 45 : 499-507, 2004
17 "A multicenter, randomized, double-blind, crossover study of patient preference for tadalafil 20 mg or sildenafil citrate 50 mg during initiation of treatment for erectile dysfunction" 25 : 2709-2723, 2003