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