1. Department of Internal Medicine Gangneung Asan Hospital University of Ulsan College of Medicine Gangneung South Korea
2. Department of Internal Medicine Soonchunhyang University College of Medicine Cheonan Hospital Cheonan South Korea
3. Department of Internal Medicine Sanggye Paik Hospital Inje University College of Medicine Seoul South Korea
4. Department of Internal Medicine Soonchunhyang University College of Medicine Bucheon Hospital Bucheon South Korea
5. Department of Internal Medicine Soonchunhyang University College of Medicine Seoul Hospital Seoul South Korea