1. Department of Clinical Science and Education; Karolinska Institutet; Södersjukhuset; Stockholm Sweden
2. Section of Emergency Medicine; Karolinska Institutet; Södersjukhuset; Stockholm Sweden
3. Section of Cardiology; Karolinska Institutet; Södersjukhuset; Stockholm Sweden
4. School of Health Sciences; Research Centre PreHospen; University of Borås; Prehospital Research Centre of Western Sweden; Borås Sweden
5. Nackageriatriken AB; Aleris AB; Nacka Hospital; Nacka Sweden