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07194167 �ALEX HOFFORD/EPA/MAXPPP HONG KONG 20181128 Mainland Chinese scientist He Jiankui presents a slide showing his work at the Second International Summit on Human Genome Editing, at the University of Hong Kong in Hong Kong, China, 28 November 2018. He Jiankui claims to have created the world's first genetically-edited twin babies, named Lulu and Nana, and has defended his work amid a storm of criticism from the world's scientific community. Critics have called the scientist's work medically unnecessary and ethically questionabl