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Arnason E, Hernandez UB, Kristinsson K.Arnason E, et al.PLoS One. 2009 May 27;4(5):e5529. doi: 10.1371/journal.pone.0005529.PLoS One. 2009.PMID: 19479037Free PMC article.
Árnason E, Halldórsdóttir K.Árnason E, et al.PeerJ. 2015 Feb 24;3:e786. doi: 10.7717/peerj.786. eCollection 2015.PeerJ. 2015.PMID: 25755922Free PMC article.