Siddique, . S. ., S. Zahoor, H. M. . Mahboob, Y. . Imran, . S. . Asif, and U. . Malik. “Correlation of Neutrophil to Lymphocyte Ratio and Disease Activity in Patients of Ankylosing Spondylitis on Etanercept Therapy”. Pakistan Journal of Medical Research, vol. 59, no. 4, Jan. 2021, pp. 157-60, https://pjmr.org.pk/index.php/pjmr/article/view/156.