1. Department of Intensive Care Medicine, Inselspital, Bern University Hospital, Bern, Switzerland
2. Swiss Cave Rescue Organization (Spéléo-Secours Suisse), La Chaux-de-Fonds, Switzerland
3. Swiss Alpine Rescue, Zürich Airport, Zürich, Switzerland
4. Air Glaciers SA, Sion, Switzerland
5. Department of Intensive Care Medicine, Kantonsspital Aarau, Aarau, Switzerland
6. Department of Emergency Medicine, Spital Thun, Thun, Switzerland
7. Department of Intensive Care Medicine, Spital Thun, Thun, Switzerland
8. Department of Anesthesiology and Perioperative Medicine, Hospital of Valais, Sion, Switzerland
9. Mobile Anesthesia Care, Bulle, Switzerland