1. 3. TP Habif, JL Campbell, MS Chapman, JG Dinulos, and KA Zug ,eds.Hypersensitivity syndrome and vasculitis .In: Skin disease: diagnosis and treatment.Philadelphia:Elsevier Mosby,2005 :284 –7 .
2. 4. K Wolff, RA Johnson, and D Surmond ,eds.Erythema multiforme syndrome .In: Fitzpatrick's color atlas and synopsis of clinical dermatology.New York:McGraw Hill,2005 :140 –7 .
3. Diagnosis, classification, and management of erythema multiforme and Stevens-Johnson syndrome