5Celebi N,Weyrich P,Riessen R.Problem based training for medical students reduces common prescription errors:a randomised controlled trial[J].Med Educ,2009,43 (10):1010-1018.
6Macall an DC,Kent A,Holm es SC.A model of clinical problem based learning for clinical at tachments in medicine[J].Med E duc,2009,43(8):799-807.
7Guk as ID,Lein st er S J,Walker R.Verbal and non verbal indices of learning during problem based learning(PBL) among first year medical students and the threshold for tutor inter vention[J].Med Teach,2010,32(1):e5-e11.
8Mart inez W,Azzam A,Mack K.Student near peer cotutors in PBL groups[J].Med Educ,2009,43(5):475-476.