1. Global leprosy update, 2018: moving towards a leprosy-free world;WHO;Weekly epidemiological record,2019
2. WHO. Chemotherapy for leprosy control programmes. 1982.
3. Classification of leprosy according to immunity. A five-group system;DS Ridley;Int J Lepr Other Mycobact Dis,1966
4. Leprosy now: epidemiology, progress, challenges, and research gaps;LC Rodrigues;Lancet Infect Dis,2011