By the time I graduated from medical school, heart
transplant surgery had become conventional, so I moved to Los Angeles and did something I've never told anyone else about: I spent a couple of years rolling pennies and eating canned spinach and pasta while I
tried to understand the universe, an effort I felt had reached a dead end.
He developed new techniques for
transplant surgery, helped to make kidney transplantation viable and was one of the first researchers to
try xenografts — in the 1960s he placed baboon kidneys in six patients.