1 Department of Medicine, Center for Resuscitation Science, Karolinska Institutet, Solna, Sweden; Department of Anaesthesiology and Intensive Care, Norrtälje Hospital, Sweden. Electronic address: lis.abazi@ki.se.
2 Department of Medicine, Center for Resuscitation Science, Karolinska Institutet, Solna, Sweden.
3 Department of Medicine, Center for Resuscitation Science, Karolinska Institutet, Solna, Sweden; Department of Anaesthesiology and Intensive Care, Norrtälje Hospital, Sweden.