1. School of Health and Social Sciences; University of Dalarna; Falun Sweden
2. Centre for Clinical Research, Uppsala University; Västerås Sweden
3. The Centre for Pre-hospital Care in Western Sweden, Prehospen, University of Borås; Borås Sweden
4. Stockholm Pre-hospital Centre, South Hospital; Stockholm Sweden
5. Department of Molecular and Clinical Medicine; Institution of Medicine, Sahlgrenska University Hospital; Göteborg Sweden