ADVANCE FOR USE FRIDAY, NOV. 11, 2016 AND THEREAFTER-Mike Baughman sits for a photo at his home in Danville, Calif., on Tuesday, Aug. 2, 2016. The 64-year-old is among hundreds of veterans who have been diagnosed with a rare form of bile duct cancer that may be linked to their time in the service and an unexpected source: parasites in raw or poorly cooked river fish. (AP Photo/Ben Margot)
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