[1]
E. Borisova, S. Ivankovska, P. Pavlov, P. Tonchev, and P. Glogovska, “Vitamin D in COPD with CKD”, MR, vol. 62, no. 5, Sep. 2026, Accessed: Sep. 14, 2026. [Online]. Available: https://journals.mu-sofia.bg/index.php/mr/article/view/1137