Fareed, S., S. Hussain, S. Batool, A. Amir, N. Khattak, and M. Ali. “ROLE OF TOBACCO SMOKING IN CAUSING HYPOMAGNESEMIA AND RHEUMATOID ARTHRITIS”. Pakistan Journal of Physiology, Vol. 17, no. 2, June 2021, pp. 46-50, http://pjp.pps.org.pk/index.php/PJP/article/view/1331.