1 Department of Pediatrics, Uijeongbu St. Mary’s Hospital, The Catholic University of Korea College of Medicine, Uijeongbu, South Korea
2 Pathology, Uijeongbu St. Mary’s Hospital, The Catholic University of Korea College of Medicine, Uijeongbu, South Korea
3 Department of Thoracic and Cardiovascular Surgery, Uijeongbu St. Mary’s Hospital, The Catholic University of Korea College of Medicine, 271 Cheonbo Street, Uijeongbu City 480-717, Gyeonggi-do, Korea