{{Rsnum
|rsid=56013859
|Gene=PER2
|Chromosome=2
|position=238276865
|Orientation=plus
|GMAF=0.1166
|Gene_s=PER2
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
}}{{PMID Auto
|PMID=23533602
|Title=Association of PER2 Genotype and Stressful Life Events with Alcohol Drinking in Young Adults
|OA=1
}}