P. Woo, S. Lau, J. Teng, H. Tse, and {. Yuen. Clinical Microbiology and Infection: The Official Publication of the European Society of Clinical Microbiology and Infectious Diseases, 14 (10):
908--934(October 2008)PMID: 18828852.
S. Baker, and G. Dougan. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, (July 2007)PMID: 17582565.