1. Institute of Image-Guided Surgery, IHU-Strasbourg, Strasbourg, France;
2. Measurements and Biomedical Instrumentation Lab, Università Campus Bio-Medico di Roma, Rome, Italy;
3. Department of Electronics and Telecommunications, Politecnico di Torino, Turin, Italy;
4. Research Institute against Digestive Cancer, IRCAD, Strasbourg, France;
5. Digestive Endoscopy Unit, Università Cattolica del Sacro Cuore, Rome, Italy;
6. Gastrointestinal Endoscopy Unit, Università Campus Bio-Medico di Roma, Rome, Italy