1. Krankenhaus Salzhausen; Salzhausen Germany
2. Abteilung Gynaekologie; Klinik Hallerwiese; Nuremberg Germany
3. Department of Anesthesiology; Penn State College of Medicine-Milton S. Hershey Medical Center; Hershey Pennsylvania
4. CRISMA (Clinical Research, Investigation, and Systems Modeling of Acute Illness) Center, Department of Critical Care Medicine; University of Pittsburgh; Pittsburgh Pennsylvania