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Representatives of government health departments and patients ' organizations from all European countries met with diabetes experts under the aegis of the World Health Organization ( WHO ) Europe and the International Diabetes Federation ( IDF ) Europe .
 World Health Organization, International Diabetes Federation
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 World Health Organization, International Diabetes Federation