6NEUFELD VR, BARROWS HS. The "McMaster Philosophy": An approach to medical education[J]. J Med Educ, 1974, 49(11): 1040-1050.
7KOH GC, KHOO HE, WONG ML,et al. The effects of problem-based learning during medical school on physician competency: a systematic review[J]. Canadian Medical Association Journal, 2008, 178(1): 34-41.
8LANGELOTZ C, JUNGHANS T, GUNTHER N, et al. Problem-based learning for surgery. Increased motivation with less teaching personal[J]. Chirurg, 2005, 76(5): 481-486.
9DOLMANS DH, DE GRAVE W, WOLFHAGEN IH, et al. Problem-based learning: Future challenges for educational practice and research[J]. Med Educ, 2005, 39(7): 732-741.