Drupal-Bibcite0<style face="normal" font="default" size="100%">T-cell responses to the Mycobacterium tuberculosis-specific antigen ESAT-6 in Brazilian tuberculosis patients.</style><style face="normal" font="default" size="100%">T-cell responses to the Mycobacterium tuberculosis-specific antigen ESAT-6 in Brazilian tuberculosis patients.</style>