1. Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
2. Department of Neurology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
3. Department of Internal Medicine, Good Gangan Hospital, Busan, Republic of Korea
4. Department of Internal Medicine, Inje University Busan Paik Hospital, Inje University College of Medicine, Busan, Republic of Korea
5. Department of Internal Medicine, Bong Seng Memorial Hospital, Busan, Republic of Korea
6. Department of Internal Medicine, Gospel Hospital, Kosin University College of Medicine, Busan, South Korea