Asghar, Kashif, and Asif Loya. “INDOLEAMINE 2,3 DIOXYGENASE AS AN IMMUNOTHERAPEUTIC TARGET BRINGS A NEW HOPE FOR CANCER PATIENTS”. Journal of Cancer & Allied Specialties 4, no. 3 (September 30, 2018). Accessed September 27, 2021. https://journals.sfu.ca/jcas/index.php/jcas/article/view/175.