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New pill gets a grip The ability to perform measurements and obtain images at different locations along the human gastrointestinal tract would be of considerable benefit in various branches of medicine. In recent years several biomedical companies have developed so-called wireless capsules that can take images inside the gut after they have been swallowed. However, these devices cannot be stopped at a particular location inside the gut because they are carried along by the natural process of peristalsis.
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