1. Department of Family Medicine, Seoul National University Hospital, Seoul, Korea
2. Department of Family Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
3. International Healthcare Center, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
4. Department of Family Medicine, Health System Gangnam Center, Seoul National University Hospital, Seoul, Korea
5. Movici Clinic, Seoul, Korea