{{Rsnum
|rsid=55687900
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
|Chromosome=19
|Orientation=plus
|Gene=HCN2
|position=610401
|Gene_s=HCN2
|Assembly=GRCh37.p10
|GenomeBuild=37.5
|dbSNPBuild=138
}}{{PMID Auto
|PMID=23907424
|Title=Hyperpolarization-activated cyclic nucleotide-gated 2 (HCN2) polymorphism is associated with chronic inflammatory periodontitis. A cross-sectional study
}}