1. Department of Critical Care Medicine, Faculty of Medicine, Universidad de la República (UDELAR), Montevideo, Uruguay
2. Clinical Evaluation Research Unit, Kingston General Hospital, Ontario, Canada
3. St Michael’s Hospital and University of Toronto, Toronto, Ontario, Canada
4. Division of Pulmonary and Critical Care, Department of Medicine, University of Vermont College of Medicine, Burlington, Vermont
5. Department of Medicine, Queen’s University Kingston, Ontario, Canada