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Professor of Medicine, Sungkyunkwan University School of Medicine,
Professor, Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine,
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Clinical Associate Professor, Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine,
Assistant Professor, Interventional bronchoscopy (Tracheobronchial stenosis), Endobronchial ultrasound (EBUS), Tuberculosis and respiratory infection,
Chair Professor, Sungkyunkwan University School of Medicine Professor, Department of Thoracic and Cardiovascular Surgery Samsung Medical Center Director, Patient-Centered Outcomes Research Institute,
Associate Professor, Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine,
Assistant Professor, Department of Thoracic and Cardiovascular Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine,
Professor, Department of Hematology & Oncology, Samsung Medical Center,
Professor, Div of Hematology-Oncology,
Professor, Division of Hem/Oncology, Samsung Medical Center,
clinical assistant professor Department of Internal Medicine, Division of Hematology-Oncology, Samsung Medical Center,
Professor Department of Radiation Oncology Samsung Medical Center Sungkyunkwan University School of Medicine,
Professor of Department of Radiation Oncology, Sungkyunkwan University School of Medicine,
Radiation Oncology "Instructor, Department of Radiation Oncology, Sungkyunkwan University School of Medicine, Samsung Medical Center",