1. Staff Anaesthesiologist
2. Veterinarian and Laboratory Leader
3. Medical Student
4. Specialist in Transfusion Medicine and Medical Director, DRK‐Blutspendedienst West, ZBST, Ratingen, Germany
5. Professor of Anaesthesiology and Intensive Care Therapy, and Chairman, Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg‐Essen and Universitätsklinikum Essen, Germany