S. Huang, и R. Platt. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 36 (3):
281--285(февраля 2003)PMID: 12539068.
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.