Yuri Nikiforov and Marina Nikiforova saw the effects of thyroid cancer on children in Belarus. Now, their test for the disease has eliminated thousands of unneeded surgeries.
Letters: Republicans failed attempt to oust governor sfchronicle.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from sfchronicle.com Daily Mail and Mail on Sunday newspapers.