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Who is Dr Victor Chang? Google Doodle celebrates surgeon
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Ashton Kutcher reveals the moment his twin almost lost his life
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Man, 57, who received first pig heart transplant dies after 2 months
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Man receives genetically modified pig heart in world-first transplant
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Mother survives heart swap and cancer as baby has liver transplant
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First ever robotic heart will end need for transplants, scientists say
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Girl, six, thrives at school three years after heart transplant
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Heart transplant recipient and donor's family meet at baseball game
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Scientists print 3D heart with human tissue in world first
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