Fig. 1

Timing of four serial gene expression profiling scores to predict future clinical events. Four gene expression profiling (GEP) scores were collected beginning day 315 post-transplant. The first and the fourth GEP score were at least 85 days apart and at most 780 days apart. Clinical events were observed ≥ 3 years after the last available score (GEP 4). Therefore, the overall follow-up was up to 6 years (if the patient enrolled in the beginning of 2006 and had a clinical follow-up in late 2011). DOT: date of transplant