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Correlation between timing of PCR results and rates of progression disease
| PCR assay results | No. patients | No. of PDs (%) | |
| Baseline | Follow-up | ||
| negative | negative | 18 | 3 (17) |
| negative | positive | 56 | 19 (34) |
| positive | negative | 15 | 1 (7) |
| positive | positive | 60 | 26 (43) |
PD, progression disease
