¹Department of Pathology, Gachon University Gil Medical Center, Incheon, Korea
²Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
³Dong-A University College of Medicine, Busan, Korea
⁴Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
⁵Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
⁶National Cancer Center, Goyang, Korea
⁷Seoul St. Mary’s Hospital, The Catholic University of Korea, Seoul, Korea
⁸Seoul National University Bundang Hospital, Seongnam, Korea
⁹Chonnam National University Medical School, Gwangju, Korea
¹⁰Busan National University School of Medicine, Busan, Korea
¹¹Inha University School of Medicine, Incheon, Korea
¹²Chonbuk National University Medical School, Jeonju, Korea
¹³Yonsei University Wonju College of Medicine, Wonju, Korea
¹⁴Kyung Hee University School of Medicine, Seoul, Korea
¹⁵Konkuk University School of Medicine, Seoul, Korea

Corresponding author:  Seung Yeon Ha,
Email: syha@gilhospital.com

Received: 4 April 2018   • Revised: 27 June 2018   • Accepted: 9 July 2018