1. Department of Internal Medicine, Oncology and Rehabilitation, Paracelsus Hospital, Scheidegg, Germany
2. Department of Pathology, University of Tübingen, Tübingen, Germany
3. Department of Gastroenterology, Oncology, Rheumatology, University of Würzburg, Würzburg, Germany
4. Matrigene GmbH Company, Reutlingen, Germany