1. Health Policy Center, The Urban Institute, Washington, DC, USA
2. University of Texas School of Biomedical Informatics and the UT-Memorial Hermann Center for Healthcare Quality and Safety, Houston, TX, USA
3. Houston Veterans Affairs Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey Veterans Affairs Medical Center and the Section of Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA