Imani, Danyal, Ramazan Rezaei, Davood Jafari, Bahman Razi, Shahab Alizadeh, Mohammad Bashashati, and Nima Rezaei. “IL-6 174 G/C Polymorphism in Inflammatory Bowel Disease: A Systematic Review and Meta-Analysis”. Acta Medica Iranica 56, no. 12 (January 22, 2019): 740-749. Accessed October 18, 2019. http://acta.tums.ac.ir/index.php/acta/article/view/7340.