1. Department of Pathology, Korea University Guro Hospital, Korea University College of Medicine, Guro-gu, Seoul, Republic of Korea
2. Department of Pathology, Catholic Kwandong University International St Mary's Hospital, Incheon, Republic of Korea
3. Department of Pathology, Green Cross Laboratories, Yongin, Kyeonggi-Do, Republic of Korea
4. Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Seoul, Republic of Korea