1. Department of Pathology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
2. Department of Clinical Laboratory Science, Dongnam Health University, Suwon, Korea
3. Department of Pathology, Korea Cancer Center Hospital, Seoul, Korea
4. Department of Pathology, Yonsei University Severance Hospital, Seoul, Korea
5. Department of Pathology, Daehang Hospital, Seoul, Korea