Vermeer, Alexa M C Letter by Vermeer et al Regarding Article, "Phenotypic Spectrum of HCN4 Mutations: A Clinical Case". [electronic resource] - Circulation. Genomic and precision medicine 05 2018 - e002160 p. digital Publication Type: Letter; Comment ISSN: 2574-8300 Standard No.: 10.1161/CIRCGEN.118.002160 doi Subjects--Topical Terms: Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels--geneticsMutationPotassium Channels--genetics