U. Lorenz, M. Abele-Horn, D. Bussen, and A. Thiede. Langenbeck's Archives of Surgery / Deutsche Gesellschaft Für Chirurgie, 392 (6):
761--765(November 2007)PMID: 17661075.
L. Haddow, C. Mulgrew, A. Ansari, J. Miell, G. Jackson, H. Malnick, and G. Rao. Clinical Microbiology and Infection: The Official Publication of the European Society of Clinical Microbiology and Infectious Diseases, 9 (5):
426--30(May 2003)PMID: 12848758.