1 Department of Gastroenterology, São João University Hospital, Alameda Professor Hernâni Monteiro, 4200-427, Porto, Portugal; WGO Gastroenterology and Hepatology Training Center, Porto, Portugal.
2 Department of Gastroenterology, São João University Hospital, Alameda Professor Hernâni Monteiro, 4200-427, Porto, Portugal; WGO Gastroenterology and Hepatology Training Center, Porto, Portugal; Faculty of Medicine of the University of Porto, Alameda Professor Hernâni Monteiro, Porto 4200-427, Portugal.
3 Faculty of Engineering of the University of Porto, Rua Dr. Roberto Frias, Porto 4200-465, Portugal; INEGI - Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, Porto 4200-465, Portugal.
4 Department of Gastroenterology, São João University Hospital, Alameda Professor Hernâni Monteiro, 4200-427, Porto, Portugal; WGO Gastroenterology and Hepatology Training Center, Porto, Portugal. Electronic address: [email protected].