J. Winstead, D. McKinsey, S. Tasker, M. Groote, и L. Baddour. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 30 (1):
87--94(января 2000)PMID: 10619738.
M. Dworkin, L. Park, и S. Borchardt. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 44 (6):
810--6(марта 2007)PMID: 17304452.