5Williams B. Case based learning-a review of the literature: is there scope for this educational paradigm in prehospital education [J]. Emerg Med J,2005,22:577-581.
6Richard B, David I, Derek L. Problem-based learning and the medical school : another case of the emperor's new clothes? [J]. Adv Physiol Educ. 2005,29 : 194-196.