R. Brooks, C. Woods, D. Benjamin, и N. Rosenstein. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 43 (1):
49--54(июля 2006)PMID: 16758417.
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.