Article Takedown/Update Request

This is an update request for the document The hyperpolarization-activated channel HCN4 is required for the generation of pacemaker action potentials in the embryonic heart by J. Stieber, S. Herrmann, S. Feil, J. Loster, R. Feil, M. Biel, F. Hofmann and A. Ludwig

Your paper was deposited in MUCC (Crossref) and appears online at http://www.pnas.org/content/100/25/15235.full.pdf
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