1. Department of Family Medicine, St. Vincent's Hospital, College of MedicineThe Catholic University of Korea Seoul Republic of Korea
2. Department of Electrical and Computer EngineeringSungkyunkwan University Suwon Republic of Korea
3. Center for Neuroscience Imaging ResearchInstitute for Basic Science (IBS) Suwon Republic of Korea
4. School of Electronic and Electrical EngineeringSungkyunkwan University Suwon Republic of Korea
5. Department of Rehabilitation Medicine, College of Medicine, Yeouido St. Mary's Hospital, College of MedicineThe Catholic University of Korea Seoul Republic of Korea
6. Department of Family Medicine, Uijeongbu St. Mary's Hospital, College of MedicineThe Catholic University of Korea Seoul Republic of Korea