title: Rebuttal from John H. Coote and Michael J. White.
authors: School of Clinical and Experimental Medicine, University of Birmingham, Birmingham B15 2TT, UK. j.h.coote@bham.ac.uk.
authors: John H
authors: JH
authors: Coote
authors: Michael J
authors: MJ
authors: White
mesh_terms: D056352:Athletes; D015536:Down-Regulation; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D064428:Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels / Q000378:metabolism*; D012849:Sinoatrial Node / Q000378:metabolism*
chemical_list: D064428:Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels