1. Retina Service, Department of Ophthalmology and Visual Sciences, University of Iowa Hospitals and Clinics, Iowa City, Iowa
2. Department of Veterans Affairs, Iowa City VA Medical Center, Iowa City, Iowa
3. Department of Electrical and Computer Engineering, University of Iowa, Iowa City, Iowa
4. Ophthalmology Service, Onze Lieve Vrouwe Gasthuis (OLVG), Amsterdam, the Netherlands
5. Image Sciences Institute, University Medical Center Utrecht, Utrecht, the Netherlands