"All of us in [Lara's] family wanted so badly to be the match. I must have hit the refresh button a hundred times on the online test results page, before finally getting my markers," Casalotti's cousin Nisha shared to the match4Lara website earlier this month. "They didn’t match. None of ours do. So now this is a numbers game. The chances of any one person being a match are tiny, but if we can mobilize thousands…hundreds of thousands…millions of people…then the odds don’t look so bad anymore."Since the campaign launched 11 days ago, some 6,700 people have signed up for the U.K.-based Anthony Nolan bone marrow donor registry, a dramatic increase from the 1,200 who signed up over the same period in 2015. The campaign has also attracted the attention of supporters from Mark Wahlberg to Mario Testino to J.K. Rowling: