Guidelines for conducting tuberculin skin test surveys in high-prevalence countries.

Rieder HL, Chadha VK, Nagelkerke NJ, van Leth F, van der Werf MJ.

Int J Tuberc Lung Dis 2011;15 Suppl 1:S1-25.

Abstract http://www.ncbi.nlm.nih.gov/pubmed/21276325