"At Yale, I initially continued research on the problems which I brought from Poland. Within a few months, I made five papers and then published them in the leading American and British magazines. They liked me, they came to the conclusion that Ptak is good and efficient. The head of the Department of Pathology was then Richard K. Gershon, would-be Nobel Prize winner, a Polish Jew in a third generation. He died of lung cancer in 1983, at the age of fifty. We were close friends; I spent the last months of his life with him. Sometimes, speaking with me, he joked: „You're too intelligent not to be Jewish.”"