29th September 1947, Southampton, England, Dr H Bahnson (left) and Dr Alfred Blalock (right) aboard the Liner Mauretania with their wives following their arrival from New York, Dr Blalock is a specialist in the treatment and cure of "Blue Babies" and Dr B [Getty Images]

29th September 1947, Southampton, England, Dr H Bahnson (left) and Dr Alfred Blalock (right) aboard the Liner Mauretania with their wives following their arrival from New York, Dr Blalock is a specialist in the treatment and cure of "Blue Babies" and Dr Bahnson is his assistant (Photo by Popperfoto via Getty Images/Getty Images)