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Ariel Fernandez, Yun-Huei Tzeng and Sze-Bi Hsu. Subfunctionalization reduces the fitness cost of gene duplication in humans by buffering dosage imbalances. BMC Genomics 2011, 12:604. doi: http://dx.doi.org/10.1186/1471-2164-12-604. URL http://www.biomedcentral.com/1471-2164/12/604.