66079
When pans are overheated beyond approximately 350 " °C ( 660 " °F ) the PTFE coating begins to dissociate , releasing hydrofluoric acid and a variety of organofluorine compounds which can cause polymer fume fever in humans and can be lethal to birds .
 polymer fume fever
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
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Answer:
 polymer fume fever