6Donner RS, Bickley H. Pproblem based learning in American-medical education: an overview. Bull Med Libr Assoc, 1993,81 ( 3 ) : 294- 298.
7Meparland M, Noble LM, Livingston G. The effectiveness of Pproblem based learning compared to tradition teaching in undergraduate psychiatry. Medical education ,2004,38 ( 8 ) :859-687.
8Yiou R,Goodenough D.Applying problem-based learning to the teaching of anatomy:the example of Harvard Medical School[J].Surg Radiol Anat,2006,28(2):189-194.