1. Department of Family Medicine, Yongin Severance Hospital, Yonsei University College of Medicine, Gyeongi, Korea.
2. Department of Medicine, Graduate School, Yonsei University, Seoul, Korea.
3. Department of Family Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Health Medicine, Severance Hospital, Severance Check-Up, Yonsei University Health System, Seoul, Korea.