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[ad_1] The change in Zack Rogers was sudden. In the middle of his 12th birthday party, his stomach started hurting. He went to bed early that...
[ad_1] Diana Henriques was first stricken in late 1996. A business reporter for The New York Times, she was in the midst of a punishing effort...
[ad_1] This article originally appeared in Undark Magazine. For one week of every month, I have a very bad time. My back aches so badly I...