1 Department of Anesthesia and Critical Care, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain.
2 Department of Anesthesia and Critical Care, Hospital Clínic Barcelona, Institut d'Investigacions Biomédiques August Pi i Sunyer (IDIBAPS), Universitat de Barcelona, Barcelona, Spain.
3 Department of Cardiovascular Surgery and Transplantation, Hospital Universitari de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain.