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Andersen RA.Andersen RA.Philos Trans R Soc Lond B Biol Sci. 1997 Oct 29;352(1360):1421-8. doi: 10.1098/rstb.1997.0128.Philos Trans R Soc Lond B Biol Sci. 1997.PMID: 9368930Free PMC article.Review.
Andersen RA, Shenoy KV, Snyder LH, Bradley DC, Crowell JA.Andersen RA, et al.Ann N Y Acad Sci. 1999 May 28;871:282-92. doi: 10.1111/j.1749-6632.1999.tb09192.x.Ann N Y Acad Sci. 1999.PMID: 10372079Review.