6Wagner HN Jr.Molecular imaging:thriving all over the world[J].J Nucl Med,2007,48(8):15-16,19-38.
7Barens BL, Christensen, Hansen AJ. Teaching and thecase method. Harvard Business School Press[J]. Third E-dition,987.
8Richard B,David I,DerekL. Problem-based learning andthe medical school : another case of the emperor? s newclothes[J]. Advances in Physiology Education, 2005(29):194-196.
9NewmanMJ. Problem Based Learning: an introduction andoverview of the key features of the approach[J]. The Jour-nal of Veterinary Medical Education, 2005 ( 32) : 12 20.