IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-10-3-34147 Original Research Paper A cross-sectional study to Prevalence of Helicobacter pylori in peptic ulcer perforation at DMCH, Laheriasarai, Bihar Ravindra Kumar Ravi Dr. Dr. Debarshi Jana Dr. March 2021 10 3 01 02