Biography
(1) MUTAGEN is a death metal group from Finland. No extra info available.
www.mikseri.net/mutagen
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(2) MUTAGEN Is a Russian Street Punk Band .
www.mutagenpunk.ru/
(3) Mutagen is a Thrash Metal band from Philadelphia, PA. (Members of Cape of Bats and The Very Important Businessmen) http://soundcloud.com/andrew_gigan/sets/mutagen-demo-3-25-12/
Biography text from Last.fm, available under CC BY-SA.