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US has second pig-to-human heart transplant

WASHINGTON: A 58-year-old man this week became the world's second patient to receive a transplant of a genetically modified pig heart, the latest milestone in a growing field of medical research.

Transplanting animal organs into humans, called xenotransplantation, could offer a solution to the chronic shortage of human organ donations. More than 100,000 Americans are currently on waiting lists for organ transplants.