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New magnetic approach to treating heartburn It may be possible to replace your daily stomach medicine with a new magnetic device. It is called the LINX system and is composed of a series of titanium beads, each with a magnetic core. The beads are connected to form a ring shape and then implanted at the lower esophageal sphincter (LES), a circular band of muscle that closes the last few centimeters of the esophagus. The LES prevents the backward flow of stomach contents. This new medical device...