Majid Jafar at the World Economic Forum at Davos (World Economic Forum / Christian Clavadetscher)
They had promising gene therapies for their daughter's ultra-rare disease. But how to tell if one worked?
About two years ago, Majid Jafar, CEO of the 50-year-old Emirati oil firm Crescent Petroleum, found himself with a problem of his own making, one …
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