1World Health Organization. Selecting Reproductive Health Indicators: A guide for district managers. Field testing version [S]. General: WHO/RHT/HRP, 1997:4 13.
2World Health Organization. Reproductive Health Indicators for Global Monitoring. Report of an interagency technical meeting[R]. General: WHO/RHT/HRP, 1997:10-14.
3NIH Consensus Conference. Impotence. NIH Consensus Development Panel on Impotence[J]. JAMA, 1993, 270( 1 ) :83-90.
4Prins J, Blanker MH, Bohnen AM, et al. Prevalence of erectile dysfunction: a systematic review of population-based studies [ J ].Int J Impot Res, 2002, 14(6) :422-432.