[1] Hokkaido Univ, SOM, Dept Mol Surg, Sapporo, Hokkaido, Japan
[2] Hokkaido Univ, SOM, Dept Surg, Sapporo, Hokkaido, Japan
[3] Hokkaido Univ, SOM, Dept Organ Transplantat & Regenerat Med, Sapporo, Hokkaido, Japan
[4] Univ Pittsburgh, Med Ctr, Cardiovasc Inst, Pittsburgh, PA USA