1. Department of Family MedicineKorea University College of Medicine Seoul Republic of Korea
2. Division of Endocrinology and Metabolism, Department of Internal MedicineKorea University College of Medicine Seoul Republic of Korea
3. Department of Biostatistics, College of MedicineThe Catholic University of Korea Seoul Republic of Korea
4. Division of Endocrinology and Metabolism, Department of Internal Medicine, Kangnam Sacred Heart Hospital, College of MedicineHallym University Seoul Republic of Korea
5. Department of Family MedicineSahmyook Medical Center Seoul Republic of Korea