REFERENCES

REFERENCES:
 Herchline, Thomas E. "Tuberculosis." Medscape.com. Nov. 4, 2013. <http://emedicine.medscape.com/article/230802-overview#aw2aab6b2b2>.
 United States. Centers for Disease Control and Prevention. "Tuberculosis (TB): Basic TB Facts." Sept. 1, 2012. <http://www.cdc.gov/tb/topic/basics/risk.htm>.
 United States. Centers for Disease Control and Prevention. "Tuberculosis (TB): Facts Sheets." Oct. 28, 2011. <http://www.cdc.gov/tb/publications/factsheets/prevention/bcg.htm>.
 United States. Centers for Disease Control and Prevention. "Tuberculosis (TB): Testing & Diagnosis." Sept. 6, 2013. <http://www.cdc.gov/tb/topic/testing/default.htm>.