1. Department of General Surgery, Andhra Medical College, Visakhapatnam, Andhra Pradesh, India
2. Department of General Surgery, Dr. NTR University of Health Sciences, Vijayawada, Andhra Pradesh, India
3. Department of Anaesthesiology, Division of Perioperative Informatics, University of California, San Diego, La Jolla, CA, USA
4. Department of General Surgery, Kakatiya Medical College, Warangal, Telangana, India
5. Department of General Surgery, Rangaraya Medical College, Kakinada, Andhra Pradesh, India