B. Orden, R. Martínez, R. Millán, M. Belloso, and N. Pérez. Clinical Microbiology and Infection: The Official Publication of the European Society of Clinical Microbiology and Infectious Diseases, 9 (12):
1245--1247(December 2003)PMID: 14686993.
M. Breukels, E. van der Zijde, M. van Tol, and G. Rijkers. Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America, 34 (2):
191--7(January 2002)PMID: 11740707.