1 Department of Anesthesiology and Intensive Care, Institute of Clinical Science, Sahlgrenska Academy at the University of Gothenburg, Sahlgrenska University Hospital, Blå stråket 5 (5th floor), 413 45, Gothenburg, Sweden.
2 Department of Anaesthesia & Intensive Care, Institution for Clinical Sciences, Karolinska Institute, Danderyd University Hospital, Stockholm, Sweden.
3 Department of Anaesthesia and Intensive Care. Gävle County Hospital, Gävle, Sweden.
4 Department of Clinical Science, Intervention and Technology, Karolinska Institute, Stockholm, Sweden; Division of Women's Health, Karolinska University Hospital, Stockholm, Sweden.