Patel, A. A.; Swerlick, R. A.; McCall, C. O. (2006). »Azathioprine in dermatology: The past, the present, and the future«. Journal of the American Academy of Dermatology. 55 (3): 369–389. doi:10.1016/j.jaad.2005.07.059. PMID16908341.
Patel, A. A.; Swerlick, R. A.; McCall, C. O. (2006). »Azathioprine in dermatology: The past, the present, and the future«. Journal of the American Academy of Dermatology. 55 (3): 369–389. doi:10.1016/j.jaad.2005.07.059. PMID16908341.