1. Houston Veterans Affairs Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey VA Medical Center, Houston, TX, USA
2. Section of Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
3. Department of Biomedical Informatics, University of Utah, and VA Salt Lake City Health Care System, Salt Lake City, UT, USA
4. Center for Healthcare Quality and Safety, School of Biomedical Informatics, University of Texas Health Science Center, Houston, Texas, USA