6Tversky A, Kahman D. Judgment under uncertainty: Heuristics and biases[ J]. Science, 1974, ( 185 ) : 1124 - 1130.
7Gold RS, Aucote H M. ' I' m less at risk than most guys': Gaymen's unrealistic optimism about becoming infected with HIV [ J ]. International Journal of STD & AIDS, 2003, 14 (1): 18-24.
9Buekens P, Curtis S, Alayon S. Demographic and health surveys: caesarean section ratesin sub - Saharan Africa. British Medical Journal,2003, 326 (7381): 136
10Taha TE. Short postexposure prophylaxis in newbom babies to reducemother - to - child transmission of HIV - Ⅰ : NVAZ randomized clinical trial. Lancet, 2003, 362 (9391) : 1171
