1. Data Center, Center for Research on Health Care; Division of General Internal Medicine; Department of Medicine, School of Medicine; University of Pittsburgh; Pittsburgh Pennsylvania USA
2. Department of Family and Social Medicine, Department of Epidemiology and Population Health, Albert Einstein College of Medicine; Bronx New York USA
3. Department of Public Health Sciences, University of Rochester; Rochester New York USA
4. Department of Health Care Organization and Policy, University of Alabama at Birmingham; Birmingham Alabama USA
5. Indiana Clinical and Translational Sciences Institute, Indiana University School of Medicine; Indianapolis Indiana USA
6. Clinical and Translational Science Center, University of California Davis; Sacramento California USA
7. Department of Policy Analysis and Management, Cornell University; Ithaca New York USA