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Although the In Flames guitarist Jesper Strömblad was listed as the drummer , all the drums were actually played by session musician Patrik Räfling , who joined the band as a full time member shortly after the album 's release .
 Jesper Strömblad
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jesper Strömblad