Cordell, W. H., Maturi, R. K., Costigan, T. M., Marmor, M. F., Weleber, R. G., Coupland, S. G., … Sides, G. D. (2008). Tadalafil 5 mg or sildenafil citrate 50 mg administered daily for up to 6 months does not affect visual safety. In JOURNAL OF SEXUAL MEDICINE (Vol. 5, pp. 77–77). BLACKWELL PUBLISHING.

Cordell, W. H., R. K. Maturi, T. M. Costigan, M. F. Marmor, R. G. Weleber, S. G. Coupland, R. P. Danis, et al. “Tadalafil 5 mg or sildenafil citrate 50 mg administered daily for up to 6 months does not affect visual safety.” In JOURNAL OF SEXUAL MEDICINE, 5:77–77. BLACKWELL PUBLISHING, 2008.

Cordell WH, Maturi RK, Costigan TM, Marmor MF, Weleber RG, Coupland SG, et al. Tadalafil 5 mg or sildenafil citrate 50 mg administered daily for up to 6 months does not affect visual safety. In: JOURNAL OF SEXUAL MEDICINE. BLACKWELL PUBLISHING; 2008. p. 77–77.

Cordell, W. H., et al. “Tadalafil 5 mg or sildenafil citrate 50 mg administered daily for up to 6 months does not affect visual safety.” JOURNAL OF SEXUAL MEDICINE, vol. 5, BLACKWELL PUBLISHING, 2008, pp. 77–77.

Cordell WH, Maturi RK, Costigan TM, Marmor MF, Weleber RG, Coupland SG, Danis RP, McGettingan JJW, Antoszyk AN, Klise S, Sides GD. Tadalafil 5 mg or sildenafil citrate 50 mg administered daily for up to 6 months does not affect visual safety. JOURNAL OF SEXUAL MEDICINE. BLACKWELL PUBLISHING; 2008. p. 77–77.