Treatment-Change Episode (TCE) Finder. TCE Finder user interface including the input form (A) and output showing the summary of the TCEs matching the input criteria (B). The example shown here is searching TCEs containing DRV/r and RAL in the salvage regimen. Fifty-seven TCEs that met the input criteria were retrieved and the first five are shown in (A). For each TCE retrieved, the output table contains the following fields: ARVs received prior to baseline, genotypic resistance test results at baseline, plasma HIV-1 RNA levels obtained following the change in therapy, and a thumbnail image of each TCE that links to the graphical depiction of the TCE created by the TCE viewer. The graphical depiction of the last TCE in the output is shown in Figure 2.