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Johnson M, Madsen PT, Zimmer WM, de Soto NA, Tyack PL.Johnson M, et al. Among authors: tyack pl.Proc Biol Sci. 2004 Dec 7;271 Suppl 6(Suppl 6):S383-6. doi: 10.1098/rsbl.2004.0208.Proc Biol Sci. 2004.PMID: 15801582Free PMC article.