%0 Journal Article %T Serial Testing for Tuberculosis: Can We Make Sense of T Cell Assay Conversions and Reversions? %A Madhukar Pai %A Richard O'Brien %J PLOS Medicine %D 2007 %I Public Library of Science (PLoS) %R 10.1371/journal.pmed.0040208 %U http://www.plosmedicine.org/article/info%3Adoi%2F10.1371%2Fjournal.pmed.0040208