Affiliation: | a Karolinska Institutet, Department of Clinical Science and Education, Section of Cardiology, SE 118 83 Södersjukhuset, Stockholm, Sweden;b SOS Alarm, Swedish Emergency Medical Communication Centre, Stockholm, Sweden;c Department of Neurobiology, Care Sciences, and Society Division of Nursing, Karolinska Institutet, Sweden;d Karolinska Institutet, Department of Clinical Science and Education, Section of Prehospital Centre, Stockholm, Sweden |