Singh, M., Kaushal, S., Gupta, K. and Sood, A. (2020) “Role of therapeutic drug monitoring of azathioprine and thiopurine methyltransferase enzyme status in patients with inflammatory bowel disease: Indian scenario”, International Journal of Basic & Clinical Pharmacology, 9(10), pp. 1618–1624. doi: 10.18203/2319-2003.ijbcp20204109.