Landon, Bruce E., Ira B. Wilson, Neil S. Wenger, Susan E. Cohn, Carl J. Fichtenbaum, Samuel A. Bozzette, Martin F. Shapiro, and Paul D. Cleary. "Specialty training and specialization among physicians who treat HIV/AIDS in the United States." Journal of general internal medicine 17, no. 1 (2002): 12-22.