Oliveira MF de, Arcêncio RA, Ruffino-Netto A, Scatena LM, Palha PF, Villa TCS. The front door of the Ribeirão Preto Health System for diagnosing tuberculosis. Rev. Esc. Enferm. USP. 2011;45(4):898-904. doi:10.1590/S0080-62342011000400015