1 Department of Intensive Care, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark. anders.perner@regionh.dk.
2 Department of Anaesthesia and Intensive Care, Zealand University Hospital, Køge, Denmark.
3 College of Medicine, King Abdullah International Medical Research Center and Intensive Care Department, King Abdulaziz Medical City, King Saud Bin Abdulaziz University for Health Sciences, Riyadh, Kingdom of Saudi Arabia.