Officials said one person was killed and 20 others were poisoned after eating death cap mushrooms, which look and taste like safe mushrooms but can cause liver failure.
California health officials advised people to stop foraging for wild mushrooms after a poison found in one variety killed one person and caused liver damage to others.
At an international conference, researchers at the forefront of animal-human transplantation compared notes and allowed themselves the first real optimism in decades.
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