1 Department of Anaesthesiology, University Clinical Hospital of Valladolid, Valladolid, Spain; BioCritic. Group for Biomedical Research in Critical Care Medicine, Valladolid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain; Department of Surgery, University of Valladolid, Valladolid, Spain; Valladolid Health Research Institute (IBioVALL), Valladolid, Spain. Electronic address: rpoves@saludcastillayleon.es.
2 Department of Anaesthesiology, University Clinical Hospital of Valladolid, Valladolid, Spain; BioCritic. Group for Biomedical Research in Critical Care Medicine, Valladolid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain; Department of Surgery, University of Valladolid, Valladolid, Spain; Valladolid Health Research Institute (IBioVALL), Valladolid, Spain.