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Invest. Ophthalmol. Vis. Sci.. 2008; 49(6):2303-2314. https://doi.org/10.1167/iovs.07-0696

Journal of Vision. 2007; 7(9):590. https://doi.org/10.1167/7.9.590

Journal of Vision. 2003; 3(3):4. https://doi.org/10.1167/3.3.4