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Across 1. What organ transplants have done since 1967 5. Bezos is this kind of billionaire now 7. How long first heart transplant took 9. Surgeon's homeland 10. The shopping holiday when so many guns were bought 12. Magazine that announced Bezos' new worth 13. A drug mixture 15. Animal heart valve in humans now 16. What the patient's drug regimen did to his immune system 17. First heart transplant patient died because of this 19. Synonym for unprecedented 20. How many people die each day on the wait list 21. Last name of surgeon who did first heart transplant

Down 2. Medicine that makes new organ and body cooperate 3. Number of medical staff at first heart transplant 4. Jeff Bezos' Internet company 6. System that matches donors and patients 8. What the news did in 1967 10. The check that is made on any gun buyer 11. A machine heart 14. Brain-dead donor was on this 18. Brain, heart and lungs