1Department of Internal Medicine, Daegu Veterans Hospital, Daegu, Korea.
2Division of Cardiology, Department of Internal Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
3Division of Endocrinology, Department of Internal Medicine, Yeungnam University Medical Center, Yeungnam University College of Medicine, Daegu, Korea.
4Department of Clinical Pathology, School of Medicine, Kyungpook National University, Daegu, Korea.
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