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After he returned to Belgium he worked part-time at the Institute of Pharmacology and Therapeutics ( University of Ghent ) of Professor Corneille Heymans , who had won the Nobel prize for medicine in 1938 .
 Belgium, Ghent, Corneille Heymans
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Belgium, Ghent, Corneille Heymans