Effect of human apo A-I transfer on allograft vasculopathy in chimeric C57BL/6 SR-BI^+/+ mice and chimeric C57BL/6 SR-BI^−/− mice. Representative sections of allograft vasculopathy at day 21 after transplantation in control (A,C) and AdA-I (B,D)–treated C57BL/6 mice with SR-BI^+/+ (A,B) or SR-BI^−/− (C,D) bone marrow.