1. Department of Surgery, Division of Outcomes Research and Quality, Penn State College of Medicine, Hershey, PA, USA.
2. Department of Public Health Sciences, Division of Health Services and Behavioral Research, Penn State College of Medicine, Hershey, PA, USA.
3. Division of Urology, Rutgers New Jersey Medical School, Newark, NJ, USA.
4. Department of Public Health Sciences, Division of Biostatistics and Bioinformatics, Penn State College of Medicine, Hershey, PA, USA.
5. War-Related Injury & Illness Study Center, VA New Jersey Health Care System, East Orange, NJ, USA.
6. Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey VA Medical Center, Houston, TX, USA.