1. Visiting Research Scholar, Division of Regional Anesthesia & Pain Medicine/Division of Perioperative Informatics, Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
2. Department pf Surgery, Konaseema Institute of Medical Sciences and Research Foundation (KIMS&RF), Amalapuram, Andhra Pradesh, India
3. Department of General Medicine, Rangaraya Medical College, Kakinada, Andhra Pradesh, India