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Heart Failure Unit, Department of Internal Medicine, Hospital São Francico Xavier, Centro Hospitalar Lisboa Ocidental, NOVA Medical School, Faculdade de Ciências Médicas, Universidade Nova de Lisboa, Lisbon, Portugal
Department of Anaesthesia and Critical Care Medicine, Cardiothoracic Anaesthesia and Intensive Care, Azienda Ospedaliero Universitaria Pisana, Pisa, Italy