TY - JOUR T1 - Latent tuberculosis infection: old problem, new priorities JF - Canadian Medical Association Journal JO - CMAJ SP - 759 LP - 761 VL - 166 IS - 6 AU - Kevin Schwartzman Y1 - 2002/03/19 UR - http://www.cmaj.ca/content/166/6/759.abstract ER -