[Importance of periodical mass chest-x-ray surveys].
D003625:Data Collection; D006801:Humans; D008400:Mass Chest X-Ray; D014376:Tuberculosis; D014397:Tuberculosis, Pulmonary / Q000517:prevention & control*; D014965:X-Rays
TUBERCULOSIS, PULMONARY/prevention and control
Importancia de los examenes radiológicos periódicos a las colectividades.