Amy Neiwirth is a Columbus-based artist who makes tiny clay models of popular foods: pizzas, cakes, waffles, even retro TV dinners.But Neiwirth, 35, doesn't eat any of those foods herself -- not the conventional versions, anyway. She's one of the 3.1 million Americans who follows a gluten-free diet, even though she tested negative for celiac disease.Such people are called "PWAGs," in the medical jargon: [...]
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