Shanzhen Shi, Jiaxing Feng, Lixiang Zhou, Yu Li, Huaxiu Shi. Risk Factors for Vitamin D Deficiency in Inflammatory Bowel Disease: A Systematic Review and Meta-Analysis. Turkish Journal of Gastroenterology [Internet]. 2021 Jun. 1 [cited 2025 Jul. 20];32(6):508-1. Available from: https://tjg.avesjournals.com/index.php/tjg/article/view/4081