1 Chirurgische Klinik, Campus Charité Mitte/Campus Virchow-Klinikum, Charité Universitätsmedizin Berlin, Berlin, Germany; Department of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass. Electronic address: philippa.seika@charite.de.
2 Chirurgische Klinik, Campus Charité Mitte/Campus Virchow-Klinikum, Charité Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute of Health, Charité Universitätsmedizin Berlin, Berlin, Germany.