1. Department of Anesthesia Montreal General Hospital; Montreal Canada
2. Anesthesia; University of the Study of Milan; Lodi Italy
3. Research Institute of the McGill University Health Centre; Montreal Quebec Canada
4. Universita degli Studi Gabriele d'Annunzio Chieti e Pescara; Chieti Scalo Italy
5. Intensive Care Unit; Ospedale Niguarda CÃ Granda; Milan Italy
6. Department of Life; Health and Environmental Sciences; L'Aquila Italy
7. Anesthesia; McGill University; Montreal Quebec Canada