P V M Lakshmi, Navkiran Kaur Virdi, J S Thakur, Kirk R Smith, Michael N Bates, Rajesh Kumar. Biomass fuel and risk of tuberculosis: a case–control study from Northern India. J Epidemiol Community Health 2012;66:5 457-461 Published Online First: 30 November 2010 doi:10.1136/jech.2010.115840→ View PDF