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Journal of Vision. 2011; 11(3):8. doi: https://doi.org/10.1167/11.3.8

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Journal of Vision. 2008; 8(6):152. doi: https://doi.org/10.1167/8.6.152

Journal of Vision. 2007; 7(9):993. doi: https://doi.org/10.1167/7.9.993