[1] Pusan Natl Univ, Dept Thorac & Cardiovasc Surg, Sch Med, Busan 49241, South Korea
[2] Pusan Natl Univ, Dept Thorac & Cardiovasc Surg, Yangsan Hosp, Yangsan 50612, South Korea
[3] Pusan Natl Univ, Yangsan Hosp, Transplantat Res Ctr, Res Inst Convergence Biomed Sci & Technol, Yangsan 50612, South Korea
[4] Catholic Kwandong Univ, Int St Marys Hosp, Dept Neurol, Coll Med, Incheon 22711, South Korea
[5] Catholic Kwandong Univ, Int St Marys Hosp, Dept Internal Med, Coll Med, Incheon 22711, South Korea