1. Department of Molecular Physiology and Biophysics, University of Iowa, Iowa City, Iowa
2. Department of Neurology, University of Iowa, Iowa City, Iowa
3. Center for the Prevention and Treatment of Visual Loss, Department of Veterans Affairs Health Center, Iowa City, Iowa
4. Department of Pharmacology and Toxicology, University of Otago, Dunedin, New Zealand
5. Maurice Wilkins Centre for Molecular Biodiscovery, School of Biological Sciences, The University of Auckland, Auckland, New Zealand