Affiliation: | (1) South Carolina Rural Health Research Center, Department of Health Services Policy and Management, Arnold School of Public Health, University of South Carolina, 29208 Columbia, SC, USA;(2) Department of Health Services Policy and Management, Arnold School of Public Health, University of South Carolina, 29208 Columbia, SC, USA;(3) South Carolina Rural Health Research Center, Department of Health Services Policy and Management, Arnold School of Public Health, University of South Carolina, 29208 Columbia, SC, USA;(4) Department of Health Services Policy & Management, School of Public Health, China Medical University, 91 Hsueh-Shih Road, 40402 Taichung, Taiwan |