| Affiliation: | 1. Department of Health Law, Policy, and Management, School of Public Health, Boston University, Boston, Massachusetts, USA;2. Department of Health Law, Policy, and Management, School of Public Health, Boston University, Boston, Massachusetts, USA School of Law, Boston University, Boston, Massachusetts, USA;3. Department of Health Management and Policy, College of Public Health, University of Kentucky, Lexington, Kentucky, USA;4. Bureau of Primary Health Care, Health Resources and Services Administration, Rockville, Maryland, USA |
