1 Department of Ophthalmology, Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, Ohio; Department of Radiation Oncology, Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, Ohio.
2 Department of Radiation Oncology, Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, Ohio.
3 Department of Ophthalmology, Cole Eye Institute, Cleveland Clinic Foundation, Cleveland, Ohio. Electronic address: singha@ccf.org.