Affiliation: | 1. Department of Surgery, Leiden University Medical Center, K6-R, P.O. Box 9600, 2300 RC, Leiden, The Netherlands 2. Department of Radiotherapy, The Netherlands Cancer Institute, Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands 3. Department of Gastroenterology and Hepatology, The Netherlands Cancer Institute, Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
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