1. Department of Radiation Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT 84112, USA
2. Department of Radiation Oncology, Intermountain Medical Center, 5131 Cottonwood Street, Murray, UT 84107, USA
3. Rocky Mountain Retina Associates, Murray, UT 84107, USA
4. Retina Associates of Utah, Murray, UT 84107, USA