Harlim, A., and M. Z. Rahfiludin. “Indoleamine 2, 3-Dioxygenase (IDO) Levels in Leprosy Patients With Positive Serology”. Journal of Pakistan Association of Dermatologists, vol. 27, no. 2, July 2018, pp. 131-4, doi:10.66344/jpad.27.2.2017.1079.