1 Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, 1198 Namdong-Gu, Guwal-Dong, Incheon, Korea.
2 Department of Thoracic and Cardiovascular Surgery, Gachon University Gil Medical Center, 1198 Namdong-Gu, Guwal-Dong, Incheon, Korea. Electronic address: cdgpch@gilhospital.com.