1. Department of Clinical Chemistry and Laboratory Medicine Kyushu University Hospital Fukuoka Japan
2. Research Center for Endocrine and Metabolic Diseases, Chungnam National University Hospital Chungnam National University School of Medicine Daejeon Korea
3. Department of Medical Science Chungnam National University School of Medicine Daejeon Korea
4. Department of Clinical Chemistry and Laboratory Medicine, Graduate School of Medical Sciences Kyushu University Fukuoka Japan