Groote Schuur Hospital is a large, government-funded, teaching hospital situated on the slopes of Devil's Peak in the city of Cape Town, South Africa, it's famous for being the institution where the first human-to-human heart transplant took place, conducted by University of Cape Town-educated surgeon Christiaan Barnard on the patient Louis Washkansky, he was a South African man who was the recipient of the world's first human-to-human heart transplant, and the first patient to regain consciousness following the operation, and lived for how many days?