MATHEMATICAL MODEL FOR PREDICTING THE EFFECTIVENESS OF TREATMENT OF PATIENTS WITH CHRONIC PANCREATITIS WITH EXOCRINE PANCREATIC INSUFFICIENCY AND VITAMIN D DEFICIENCY. ijai [Internet]. 2024 May 4 [cited 2025 Nov. 13];4(02):99-101. Available from: https://www.academicpublishers.org/journals/index.php/ijai/article/view/366