Comparative yield of tuberculosis during active case finding using  GeneXpert or smear microscopy for diagnostic testing in Nepal: a cross-sectional study by Gurung, SC, Dixit, K, Rai, B, Dhital, R, Paudel, PR, Acharya, S, Budhathoki, G, Malla, D, Levy, JW, Lönnroth, K, Ramsay, A, Basnyat, B, Thapa, A, Mishra, G, Subedi, B, Shah, MK, Shrestha, A, Caws, M