1. Fondazione Policlinico Universitario A. Gemelli IRCCS, Digestive Endoscopy Unit, Rome, Italy
2. Università Cattolica del Sacro Cuore, CERTT, Centre for Endoscopic Research, Therapeutics and Training, Rome, Italy
3. IHU-Strasbourg, Institute of Image-Guided Surgery, Strasbourg Cedex, France