a1 Intensive Care Unit, Department of Surgery, University Hospital, Medical Faculty, Otto von Guericke University, Leipziger Strasse 44, D-39120 Magdeburg, Germany
a2 Institute of Medical Microbiology, University Hospital, Otto von Guericke University, Magdeburg, Germany
Correspondence:
c1 *Corresponding author: Dr G. Weiss, fax +49 391 67 15570, email Guenter.Weiss@Medizin.Uni-Magdeburg.DE