1Imanieh MH, Dehghani SM, Sobhani AR, et al. Evalua- tion of problem - based learning in medical students'educa- tion[J]. J Adv Med Educ Prof,201d, 2(1) :1 -5.
2Nango E, Tanaka Y. Problem - based learning in a multi- disciplinary group enhances clinical decision making by medical students : a randomized controlled trial [ J ]. J Med Dent Sci, 2010(1) :109 -118.
3Millan LP, Semer B, Rodrigues JM, et al. Traditional learning and problem - based learning: self - perception of preparedness for internship [ J ]. Rev Assoc Med Bras. 2012,58(5) :594 -599.
4The Federation of States Medical Board of the United State, the National Board of Medical Examiners. 2010 Step 3 Con- tent Description and General Information [ M ]. New York : McGraw Hill Medical Press,2010.