Andrea Cortegiani1, Andrea Manca2, Manoj Lalu3, David Moher3. 1. Department of Surgical, Oncological and Oral Science (Di.Chir.On.S.). Section of Anesthesia, Analgesia, Intensive Care and Emergency. Policlinico Paolo Giaccone, University of Palermo, Via del Vespro 129, 90127, Palermo, Italy. andrea.cortegiani@unipa.it. 2. Department of Biomedical Sciences, University of Sassari, Sassari, Italy. 3. Centre for Journalology, Clinical Epidemiology Program, The Ottawa Hospital Research Institute, Ottawa, Canada.