1 Tampere University Hospital, Centre for Prehospital Emergency Care, Finland.
2 Corresponding author: Dr Laura J Tuominen, Tampere University Hospital, Centre for Prehospital Emergency Care, Annalankatu 17 D 15, Tampere, Finland, tuominenl@gmail.com.
3 Helsinki University Hospital and Helsinki University, Pathology, Finland.
4 Centre for Military Medicine, Finnish Defense Forces, Diving Medical Centre, Finland.