1 Joo-Hyun Park, MD, PhD, Department of Family Medicine, Korea University Ansan Hospital, Korea University College of Medicine, Ansan, Korea, Department of Healthcare Administration and Policy, School of Public Health, University of Nevada, Las Vegas, Las Vegas, NV; Jung Yong Hong, MD, PhD, Department of Healthcare Administration and Policy, School of Public Health, University of Nevada, Las Vegas, Las Vegas, NV, Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; and Kyungdo Han, PhD, Department of Statistics and Actuarial Science, Soongsil University, Seoul, Korea.