1. Department of Gastroenterology, Endocrinology, Diabetology and General Medicine Klinikum Kassel Kassel Germany
2. Campus Kassel of the University of Southampton Southampton UK
3. Department of Transfusion Medicine, Institute of Immunology and Transfusion Medicine University of Greifswald Greifswald Germany
4. Department of Intensive Care Medicine University Medical Center Hamburg‐Eppendorf Hamburg Germany