1. Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang, Republic of Korea
2. Department of Internal Medicine, Hallym University Gangdong Sacred Heart Hospital, Gangdong, Republic of Korea
3. Department of Internal Medicine, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea
4. Department of Internal Medicine, Hallym University Gangnam Sacred Heart Hospital, Seoul, Republic of Korea