1. Department of Anesthesia and Intensive Care; Pediatric Intensive Care Unit; Papa Giovanni XXIII Hospital; Bergamo Italy
2. Intensive Care Unit; Department of Intensive Care Medicine; Ente Ospedaliero Cantonale; Ospedale Regionale Bellinzona e Valli; Bellinzona Switzerland
3. Department of Emergency and Intensive Care; San Gerardo Hospital; Monza Italy
4. Department of Medicine; School of Medicine and Surgery; University of Milan-Bicocca; Monza Italy