6Swartz Mart H. Textbook of physical Diagnosis[M]. 3rd edition. Philadelphia, Saunders, 1998 : 115 -135.
7Hanson AH,Krause LK,Simmons RN,et al.Dermatology educationand the Internet:traditional and cutting-edge resources[J].J AmAcad Dermatol,2011,65(4):836-842.
8Gwee MC.Problem-based learning:a strategic learning systemdesign for the education of healthcare professionals in the 21stcentury[J].Kaohsiung J Med Sci,2009,25(5):231-239.