1. Department of Physiology and PharmacologyKarolinska InstitutetStockholmSweden
2. Department of NeuroscienceKarolinska InstitutetStockholmSweden
3. Department of SurgeryThe Carl Vinson Veterans Affairs Medical CenterDublinGeorgiaUSA
4. Department of Anesthesiology, Surgical Services, and Intensive Care MedicineKarolinska University HospitalStockholmSweden