1. Anaesthesia and Intensive Care Unit, Azienda ULSS 8, City Hospital, Via Montegrappa 34, 31044 Montebelluna (TV), Italy
2. Anaesthesia and Intensive Care Unit, Azienda ULSS 8, City Hospital, Via Montegrappa 34, 31044 Montebelluna (TV), Italy; Via Marco Polo, 25-7, 31031 Caerano S. Marco, Italy