For ten years, Leah Harp has lived with pain and uncertainty.
"Whenever I see things are going well, I get afraid," she said. "I don't want things to get worse. I am afraid sometimes it's not going to go so well."
She is one of hundreds of thousands who struggle to lead a normal life with a chronic, debilitating and embarrassing illness called ulcerative colitis.
"It's currently estimated that there are about 700,000 people with ulcerative colitis," said Dr. David Rubin, of the University...
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