1 Department of Pathology, Kyungpook National University Hospital, Kyungpook National University Medical Center, Kyungpook National University School of Medicine, Daegu, Korea.
2 Department of Surgery, Gastric Cancer Center, Kyungpook National University Medical Center, Kyungpook National University School of Medicine, Daegu, Korea.
3 Department of Pathology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea.