Arooj, Ayesha, et al. “PREVELANCE OF MUSCULOSKELETAL LOE BACK PAIN IN OFFICE WORKERS AT LAHORE , PAKISTAN: Musculoskeletal Low Back Pain”. Pakistan Armed Forces Medical Journal, vol. 68, no. 4, Aug. 2018, pp. 919-23, https://pafmj.org/PAFMJ/article/view/66.