1. Department of Laboratory Medicine, Bucheon St. Mary's Hospital, College of Medicine; The Catholic University of Korea; Bucheon-si Gyeonggi-do Republic of Korea
2. Catholic Laboratory Development and Evaluation Center, Clinical Research Coordinating Center; Catholic Medical Center; Seoul Republic of Korea
3. Division of Endocrinology and Metabolism, Department of Internal Medicine, Bucheon St. Mary's Hospital, College of Medicine; The Catholic University of Korea; Bucheon-si Gyeonggi-do Republic of Korea
4. Department of Laboratory Medicine, Seoul St. Mary's Hospital, College of Medicine; The Catholic University of Korea; Seoul Republic of Korea