{{Rsnum
|rsid=2273502
|Chromosome=20
|Orientation=plus
|geno1=(C;C)
|geno2=(C;T)
|geno3=(T;T)
|Gene=CHRNA4
|position=63356470
|Gene_s=CHRNA4
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
}}{{PMID Auto
|PMID=22180580
|Title=Association between nicotinic acetylcholine receptor single nucleotide polymorphisms and smoking cessation
}}