Sputum scarcity and associated factors in people undergoing tuberculosis testing in South Africa, Uganda, India, and the Philippines: an analysis of cross-sectional observational data
Nwamba WV, Okunola AO, Crowder R, Christopher DJ, Worodria W, Yu C, Palmer Z, Ndlangalavu G, Naidoo D, Mitchell EMH, Marx FM, Cattamanchi A, Theron G
