Steve Jobs turned down a liver transplant from Apple CEO Tim Cook, a new biography claims, NBC News reported. In "Becoming Steve Jobs," Brent Schlender and Fast Company executive editor Rick Tetzeli interviewed Cook, who revealed that he took a blood test after discovering Jobs had cancer. It turned out that they both had the same rare blood type. Cook went over to Jobs' house to offer him part of his liver. However, Jobs wasn't having any of it, according to Fast Company. Cook also said, according to the book, "Steve only yelled at me four or five times during the 13 years I knew him, and this was one of them." NBC News reached out to Apple to confirm the incident but the company did not respond.