1 Department of Internal Medicine III, University Hospital, RWTH Aachen, Germany; Department of Pediatric Gastroenterology, University of California San Diego (UCSD), and Rady Children's Hospital, San Diego, CA, United States. Electronic address: [email protected].
2 Dipartimento di Medicina Sperimentale e Clinica, University of Florence, Italy; Research Center DENOTHE, University of Florence, Italy. Electronic address: [email protected].