Liczner, Grzegorz, Michał Wiciński, Karol Cadelski, and Bartosz Malinowski. 2021. “Is the Determination of Bone Turnover Markers and Vitamin D Useful in the Diagnosis of Degeneration Spine Disease?”. Journal of Education, Health and Sport 11 (9):259-71. https://doi.org/10.12775/JEHS.2021.11.09.032.