- Correspondence to Dr George L Wehby, Departments of Health Management and Policy, Economics, and Preventive & Community Dentistry, and Public Policy Center, University of Iowa, 145 N. Riverside Dr., 100 College of Public Health Bldg., Room N248, Iowa City, IA 52242-2007, USA;
- Received February 3, 2015
- Revised June 9, 2015
- Accepted August 12, 2015
- First published September 7, 2015.
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