Prevalence of Vitamin D level deficiency among patients with non-specific musculoskeletal pain at a tertiary care hospital in Khyber Pakhtunkhwa. JPOA [Internet]. 2019 Sep. 2 [cited 2026 Apr. 16];31(02):57-60. Available from: https://mail.jpoa.org.pk/index.php/upload/article/view/312