Figure 2From: Meta-analysis to compare the accuracy of GeneXpert, MODS and the WHO 2007 algorithm for diagnosis of smear-negative pulmonary tuberculosis Flow chart for publication search. * One of the WHO publications provided separate diagnostic accuracy results for a rural and urban site. The results were therefore reported separately in Table 1. SNPTB = Smear-negative Pulmonary TB. Two landmark studies on GeneXpert were excluded [22, 23]. We contacted the author but the data provided remained incomplete to fill 2x2 tables for smear-negative PTB (SNPTB).Back to article page