1. Center for Lung Cancer National Cancer Center Goyang Republic of Korea
2. Division of Medical Oncology Department of Internal Medicine Yonsei Cancer Center Yonsei University College of Medicine Seoul Republic of Korea
3. Department of Internal Medicine Chungbuk National University Hospital Cheongju Republic of Korea
4. Department of Internal Medicine Keimyung University Dongsan Hospital Daegu Republic of Korea
5. Department of Pathology National Cancer Center Goyang Republic of Korea
6. Department of Radiology National Cancer Center Goyang Republic of Korea