Relation between Preoperative vitamin D level and Post operative Infection in Patient undergoing Pancreaticoduodenectomy (Whipple’s) procedure. J Shaheed Suhrawardy Med Coll [Internet]. 2024 May 14 [cited 2026 Jun. 30];14(2):53-7. Available from: https://www.banglajol.info/index.php/JSSMC/article/view/73179