Research Protocol - The Impact of a Tick-Sheet in Improving Interpretation Accuracy of Chest Radiographs by Non-Specialists in an HIV positive cohort

Primary objective of this study:
To determine if the application of a tick-sheet after four hour training on its use and on CXR interpretation, improves the interpretation accuracy of CXRs for active TB, by non-specialists, in an HIV-positive cohort.
Secondary objective:
To determine whether the application of a tick-sheet reduces the inter-reader variability of CXR interpretation in a group.