参考资料:1. JUNG J, CHOI S, CHO SH, et al. Tolerability and phar macokinetics of avanafil, a phosphodiesterase type 5 inhibitor: a single- and multiple- dose, double- blind, randomized, placebocontrolled, dose - escalation study in healthy Korean male volunteers. Clin Ther, 2010, 32: 1178-1187.