K. T. Vo, H. Q. Huynh, N. Q. Tran, A. Goto, Y. Suzuki, and K. T. Nguyen, “Prevalence of Erectile Dysfunction and its Associated Factors among Vietnamese Men with Type 2 Diabetes”, J ASEAN Fed Endocr Soc, vol. 29, no. 1, p. 19, May 2014.