Lakra A, Singh B, Janmeja AK, Sharma V, Kumar A. A study to assess the relationship between vitamin D3 levels and the risk of acute exacerbation in patients with chronic obstructive pulmonary disease. Monaldi Arch Chest Dis [Internet]. 2024 Mar. 1 [cited 2024 Nov. 24];. Available from: https://www.monaldi-archives.org/macd/article/view/2885