Image: Włodzimierz Ptak 2017-12 9
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Description: Włodzimierz Ptak, Polish immunologist and microbiologist, portrayed in his house in Kraków, Poland. Ptak is wearing a sweater that he received several dozen years earlier as a gift from his friend Richard K. Gershon, with whom he worked at Yale University.
Title: Włodzimierz Ptak 2017-12 9
Credit: Own work
Author: Franciszek Vetulani
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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