| − | On July 13, 2013, researchers at University of Massachusetts--Worcester took cells from Down syndrome people and were able to turn off the extra chromosomes that cause the disorder, though available treatment is still a long way from now. <ref>https://www.theguardian.com/science/2013/jul/17/downs-syndrome-cells-fixed-chromosome-therapy</ref> | + | On July 13, 2013, researchers at University of Massachusetts—Worcester took cells from Down syndrome people and were able to turn off the extra chromosomes that cause the disorder, though available treatment is still a long way from now.<ref>https://www.theguardian.com/science/2013/jul/17/downs-syndrome-cells-fixed-chromosome-therapy</ref> |