We thank all the liver transplant patients who participated in the study, Annetta Redmann from Bern CTU for logistical and technical support, and Professor Annalisa Berzigotti and Dr Giacomo Buso for statistical support and intellectual contribution. Twitter: @mario.romero@salud.madrid.org, @dufour_jf
Correction notice: This article has been corrected since it published Online First. The first affiliation has been amended.
Collaborators: COVID-LT group: Michele Colledan (Department of Surgery, General Surgery and Abdominal Transplant Unit, "Papa Giovanni XXIII" Hospital, Bergamo, Italy), Stefano Fagiuoli (Gastroenterology and Transplant Hepatology, “Papa Giovanni XXIII” Hospital, Bergamo, Italy), Stefania Camagni (Gastroenterology and Transplant Hepatology, “Papa Giovanni XXIII” Hospital, Bergamo, Italy), Jean Delwaide (Division of Hepato-Gastroenterology and Digestive Oncology, University Hospital of Liege, Liege, Belgium), Giovanni Vitale (Department of Organ Failures and Transplantation, University Hospital of Bologna, Policlinico S. Orsola-Malpighi, Bologna, Italy), Darius Moradpour (Division of Gastroenterology and Hepatology, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland), Manuel Pascual (Transplantation Center, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland), Gloria Allegrini (Department of Gastroenterology, University Hospital Ancona, Polytechnic University of Marche, Ancona, Italy), Fabio Tarsetti (Department of Gastroenterology, University Hospital Ancona, Polytechnic University of Marche, Ancona, Italy), Ugo Giustizieri (Department of Surgery, General Surgery and Abdominal Transplant Unit, "Papa Giovanni XXIII" Hospital, Bergamo, Italy), Loredana Rota (Gastroenterology and Transplant Hepatology, “Papa Giovanni XXIII” Hospital, Bergamo, Italy), Florent Artru (Division of Gastroenterology and Hepatology, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland), Anne-Catherine Saouli (Transplantation Center, Centre Hospitalier Universitaire Vaudois, University of Lausanne, Lausanne, Switzerland), Patrizia Burra (Multivisceral Transplant Unit, Department of Surgery, Oncology, Gastroenterology, Padua University Hospital, Padua, Italy), Martina Gambato (Multivisceral Transplant Unit, Department of Surgery, Oncology, Gastroenterology, Padua University Hospital, Padua, Italy), Irene Scalera (Department of Hepato-Biliary Surgery and Liver Transplantation, “Cardarelli” Hospital of Naples, Naples, Italy), Ioannis Petridis (Department for the Treatment and Study of Abdominal Diseases and Abdominal Transplantation, IRCCS-ISMETT (Istituto di Ricovero e Cura a Carattere Scientifico - Istituto Mediterraneo per i Trapianti e Terapie ad alta specializzazione), UPMC (University of Pittsburgh Medical Center) Italy, Palermo, Italy), Hugo Pinto Marques (Hepato-Biliary-Pancreatic and Transplantation Center, Curry Cabral Hospital, Lisbon's Central Hospitals and University Center, NOVA Medical School, Lisboa, Portugal), Martin-Walter Welker(Department of Internal Medicine 1, University Hospital Frankfurt, Goethe University, Frankfurt, Germany).
Contributors: CB: study concept and design, acquisition of data, analysis and interpretation of data, drafting of the manuscript, statistical analysis, administrative, technical and material support. MFZ, LP, MFD, FI, OD, GD, OC, MCM, MF, GS-B, HvV, MJC, MCR, AdG, PT: acquisition of data, critical revision of the manuscript regarding important intellectual content. LDP, CA: acquisition of data. DS, JP, FN: study concept and design, acquisition and interpretation of data, technical and material support, critical revision of the manuscript regarding important intellectual content. J-FD: study concept and design, interpretation of data, drafting of the manuscript, critical revision of the manuscript regarding important intellectual content, funding recipient, technical and material support, study supervision.
Funding: This study was funded by Stiftung für die Leberkrankheiten (Switzerland).
Competing interests: None declared.
Patient and public involvement: Patients and/or the public were not involved in the design, or conduct, or reporting or dissemination plans of this research.
Patient consent for publication: Not required.
Ethics approval: The ethical committee of each participating centre approved the study, which was carried in accordance with the Helsinki Declaration.
Provenance and peer review: Not commissioned; externally peer reviewed.
Data availability statement: Data are available on reasonable request. All data relevant to the study are included in the article or uploaded as supplementary information.