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Larson studied chemistry and chemical engineering at the University of Minnesota , graduating in 1932 , and obtained a Ph.D. at the University of California , Berkeley , studying blood clotting .
 University of Minnesota, University of California , Berkeley
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 University of Minnesota, University of California , Berkeley