Escombe, AR; Moore, DA; Gilman, RH; Navincopa, M; Ticona, E; Mitchell, B; Noakes, C; Martinez, C; Sheen, P; Ramirez, R; +4 more... Quino, W; Gonzalez, A; Friedland, JS; Evans, CA; (2009) Upper-room ultraviolet light and negative air ionization to prevent tuberculosis transmission. PLoS medicine, 6 (3). e43. ISSN 1549-1277 DOI: https://doi.org/10.1371/journal.pmed.1000043