1. Department of Health Policy and Administration, Pennsylvania State University, University Park, Pennsylvania, USA.
2. Penn State Cancer Institute, Hershey, Pennsylvania, USA.
3. Department of Public Health Sciences, College of Medicine, The Pennsylvania State University, Hershey, Pennsylvania, USA.
4. Section of Surgical Oncology, Division of Surgery, Baptist MD Anderson Cancer Center, Jacksonville, Florida, USA.
5. Department of Surgery, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA.