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Surviving volumes of his library are now scattered , some are found in libraries in Innichen , Innsbruck , and Vienna , and in the USA in the National Library of Medicine , in Yale and in the Dittrick Museum of Medical History ( 33 volumes bought in 1929 from Maggs Brothers , for GBP 2,500 ) .
 Innsbruck, National Library of Medicine, Maggs Brothers
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Innsbruck, National Library of Medicine, Maggs Brothers