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This embouchure method , advocated by a minority of brass pedagogues such as Jerome Callet , has not yet been sufficiently researched to support the claims that this system is the most effective approach for all brass performers .
 Jerome Callet
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jerome Callet