Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Republic of Korea

Keun-Wook Lee & Jin-Won Kim

Division of Hematology-Oncology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea

Da Young Zang & Bum Jun Kim

Departmentof Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea

Hyung-Don Kim, Yoon-Koo Kang & Min-Hee Ryu

Center for Gastric Cancer, National Cancer Center, Goyang, Republic of Korea

Hark Kyun Kim