Evolutionary biology: lamprey Hox genes and the evolution of jaws
Takio Y, Pasqualetti M, Kuraku S, Hirano S, Rijli F M and Kuratani S
Nature 429(6989):1 p following 262 (2004)

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LINK
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=15154395