Knee osteoarthritis 25-Hydroxy vitamin D WOMAC Physical function Kellgren–Lawrence grading
Sakr, B. R., N. M. Al-Ashmory, S. Z. Hassan, A. A. Al-Akwa, and O. G. Shaker,
"Vitamin D deficiency in Egyptian and Yemeni primary knee osteoarthritis patients: Relation to physical function and radiographic severity",
The Egyptian Rheumatologist, vol. 43, issue 1, pp. 47-52, 2021.
