Of time and were stratified into either slow progressors (SP; stage 3?4 fibrosis at 3?4 years posttransplant) or fast progressors (FP; stage 3?4 fibrosis within 2 years posttransplant). The degree of fibrosis in these transplant patients was scored from 0 to 4 utilizing the Batts-Ludwig scoring system, and the serum samples were collected at a specific time point posttransplant (See supplemental T