IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-1-45809 Original Research Paper Smoking A Bane. Hazards Of Smoking In Upper Abdominal Surgeries : A Hospital Based Prospective Study In North India. Wasim Salman Dr. Dr Tahleel Mohd Jeelani Dr. January 2023 12 1 01 02