1 From the Department of Lifelong Learning and Assessment in Health Professions, Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.
2 ICVS/3B's, PT Government Associate Laboratory, Braga, Portugal.
3 Department of Anesthesiology, Boston University Chobanian & Avedisian School of Medicine, Boston, Massachusetts.
4 Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa, Italy.
5 Department of Anaesthesiology, Critical Care and Pain Medicine, Policlinico Umberto I Teaching Hospital, Sapienza University of Rome, Rome, Italy.