1. Koch R (1982) The etiology of tuberculosis. Berl Klinische Wochenschr 19:221–230
2. WHO (1994) TB: a global emergency. WHO report on the TB epidemic (WHO/TB/94.177). Geneva, Switzerland. http://apps.who.int/iris/handle/10665/58749
3. World Health Organization (2018) Global tuberculosis report 2018. World Health Organization. http://www.who.int/iris/handle/10665/274453
4. WHO (2012) Tuberculosis, WHO report. http://www.who.int/mediacentre/factsheets/fs104/en/
5. WHO (2006) Global tuberculosis control: surveillance, planning, financing. WHO report. http://www.who.int/tb/publications/global_report/en/index.html