FIGURE 4. CFR and Rejection Episodes.
CFR values at baseline positron emission tomography imaging grouped based on the number of rejection (R) episodes prior to imaging. R0 = no rejection prior to PET-1 (baseline); R1 = 1 rejection episode; R2 = 2 rejection episodes; R3+ = 3 or more rejection episodes; other abbreviations as in Figures 1 and 2.