Dr. Suddhasattwa Sen , Senior Gi And Hepatobiliary Pancreatic Gallbladder Surgeon , Advanced Laparoscopy And Gi Hpb Oncosurgeon, Liver Biliary Pancreas Colorectal Anorectal Stomach Spleen Hernia Appendix Piles Fissure Fistula Surgeon , Kolkata West Bengal Eastern India , India