1. Department of Anaesthesia and Intensive Care, Government Medical College and Hospital, Chandigarh, India
2. Valley Anaesthesiology and Pain Consultants, Phoenix, AZ; Creighton University School of Medicine - Phoenix Regional Campus, Phoenix, AZ; University of Arizona College of Medicine-Phoenix, Department of Anesthesiology, Phoenix, AZ, USA
3. Department of Anaesthesiology and Pharmacology, Toxicology, and Neurosciences, Louisiana State University School of Medicine, Shreveport, Louisiana, USA
4. Beth Israel Deaconess Medical Center, Department of Anaesthesia, Critical Care, and Pain Medicine, Harvard Medical School, Boston, MA, USA