Anar, Ceyda, Yavuz Melike Yüksel, Güldaval Filiz, and Dilek Kalenci. “Assessment of Osteoporosis Using the FRAX Method and the Importance of Vitamin D Levels in COPD Patients”. Multidisciplinary Respiratory Medicine 13, no. 1 (December 11, 2019). Accessed July 7, 2024. https://mrmjournal.org/index.php/mrm/article/view/92.