A. O. Takure, S. A. Adebayo, L. I. Okeke, E. O. Olapade‑Olaopa, and O. B. Shittu, “Erectile dysfunction among men attending surgical outpatients Department in a Tertiary Hospital in South-Western Nigeria”, Nig. J. Surg., vol. 22, no. 1, pp. 32–36, Apr. 2016.