Kumar P, Kumar N. Perforated peptic ulcer (PPU): a one year review in tertiary care hospital in Uttarakhand, India. Int Surg J [Internet]. 2017 Dec. 26 [cited 2025 Nov. 10];5(1):82-6. Available from: https://www.ijsurgery.com/index.php/isj/article/view/2316