1. Stanford University. History of leprosy http://www.stanford.edu/group/parasites/ParaSites2005/Leprosy/history.htm
2. Global leprosy situation, 2007;World Health Organization;Wkly Epidemiol Rec,2007
3. U.S. Department of Health and Human Services, Health Resources and Services Administration Registry report: a summary of Hansen's disease in the United States 2008 http://www.hrsa.gov/hansens/dataandstatistics.html