1. Department of Physiology and PharmacologySection for Anesthesiology and Intensive Care MedicineKarolinska InstitutetStockholmSweden
2. Function Perioperative Medicine and Intensive CareKarolinska University HospitalStockholmSweden
3. Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
4. Department of Anesthesia and Intensive CareKalmar County HospitalKalmarSweden
5. Department of Ophthalmology and Vision SciencesDalla Lana School of Public HealthUniversity of TorontoTorontoOntarioCanada
6. Department of PsychologyUniversity of Southern CaliforniaLos AngelesCAUSA