Variant: rs148020424 

    present in Gene: TBX5
    present in Chromosome: 12
    Position on Chromosome: 114367252
    Alleles of this Variant: -/AAAGAAAAGAGAAA;AGAAA

rs148020424 in TBX5 gene and P wave duration (observable entity) PMID 28794112 2017 Fifteen Genetic Loci Associated With the Electrocardiographic P Wave.