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2. Global Tuberculosis Report 2016, World Health Organization. http://www.who.int/tb/publications/global_report/en/.
3. The world's deadliest disease just got deadlier, TB Europe Coalition. http://www.tbcoalition.eu/2016/10/14/the-worlds-deadliest-disease-just-got-deadlier/.
4. TB Elimination Extensively Drug-Resistant Tuberculosis (XDR-TB), Centers for Disease Control and Prevention. https://www.cdc.gov/tb/publications/factsheets/drtb/mdrtb.pdf.
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