Chest X-rays among school personnel in Massachusetts.
B J
BJ
ROBERTS
S J
SJ
SCHMIDT
D006801:Humans; D008168:Lung; D008404:Massachusetts; D013902:Radiography, Thoracic; D014376:Tuberculosis; D014397:Tuberculosis, Pulmonary / Q000000981:diagnostic imaging*; D014965:X-Rays
TUBERCULOSIS, PULMONARY/roentgenography