1. Department of Anaesthesia; Rabin Medical Center; Beilinson Hospital; Petach Tikvah Israel
2. Department of Obstetrics Gynecology; Rabin Medical Center; Beilinson Hospital; Petach Tikvah Israel
3. Department of Anaesthesia; Shaare Zedek Medical Center; Hebrew University; Jerusalem Israel
4. Department of Anesthesia; Columbia University College of Physicians and Surgeons; New York USA