Diagnosis and treatment of acute appendicitis: 2020 update of the WSES Jerusalem guidelines

University of Insubria, Cambridge University Hospitals NHS Foundation Trust, Addenbrooke's Hospital, University of Cagliari, Ospedale di Parma, University of Milano-Bicocca, University Hospital Centre Zagreb, University of Amsterdam, Ospedale di Macerata, University of Macerata, Azienda Ospedaliera Universitaria Pisana, Hôpitaux Universitaires Henri-Mondor, The University of Western Australia, Royal Perth Hospital, University of Helsinki, Helsinki University Hospital, Azienda Socio Sanitaria Territoriale Lariana, University of Hawaiʻi at Mānoa, University of Hawaii System, Queen's Medical Center, Denver Health Medical Center, University of Colorado Denver, Canberra Hospital, Stavanger University Hospital, Hebrew University of Jerusalem, Radboud University Nijmegen, Radboud University Medical Center, Hospital Universitário - Universidade Federal de Juiz de Fora, Letterkenny University Hospital, Edinburgh Royal Infirmary, Foothills Medical Centre, University of Pittsburgh, UPMC Presbyterian, University of Washington, Harborview Medical Center, UC San Diego Health System, Agostino Gemelli University Polyclinic, University of Parma, Sapienza University of Rome, University of Catania, Ospedale Cannizzaro, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Immanuel Kant Baltic Federal University, Medical University Plovdiv, Tbilisi State Medical University, Westchester Medical Center, New York Medical College, United Arab Emirates University, Bronson Methodist Hospital, Universidad Nacional de Asunción, University of Brescia, Hospital General Universitario de Alicante Doctor Balmis, St. Michael's Hospital, University of Toronto, John Hunter Hospital, Virginia Commonwealth University, Harvard University, Massachusetts General Hospital, Linköping University, Rambam Health Care Campus, Ospedale “M. Bufalini” di Cesena