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2 “...Washington D. C. , and at the Columbia University New York. In 1967 and 1968 he worked as a gen...”

3 “... regions of the globe.” —Seymour Topping, Professor Emeritus of International Journalism, Columbia...”

4 “... at Columbia University and in 1945 - there followed BLALOCK'S anastomosis for Fallot's Tetralogy...”