1. Global leprosy update, 2017: reducing the disease burden due to leprosy;Organization World Health;WER,2018
2. Classification of leprosy according to immunity a five-group system;Ridley DS;Int J Lep,1966
3. Chemotherapy of leprosy for control programmes: report of a WHO study group,1982
4. Expert committee on leprosy: fifth report. Technical report series 678,1988
5. Chemotherapy of leprosy: report of a WHO study group,1994