{{Rsnum
|rsid=7499
|Gene=COL18A1
|Chromosome=21
|position=45512414
|Orientation=plus
|GMAF=0.4669
|Gene_s=COL18A1
|Assembly=GRCh38
|GenomeBuild=38.1
|dbSNPBuild=141
|geno1=(A;A)
|geno2=(A;G)
|geno3=(G;G)
}}{{ population diversity
| geno1=(A;A)
| geno2=(A;G)
| geno3=(G;G)
| CEU | 14.2 | 45.1 | 40.7
| HCB | 32.8 | 46.7 | 20.4
| JPT | 34.5 | 46.9 | 18.6
| YRI | 26.0 | 46.6 | 27.4
| ASW | 19.3 | 42.1 | 38.6
| CHB | 32.8 | 46.7 | 20.4
| CHD | 21.1 | 56.9 | 22.0
| GIH | 17.8 | 49.5 | 32.7
| LWK | 30.9 | 42.7 | 26.4
| MEX | 14.0 | 42.1 | 43.9
| MKK | 33.3 | 45.5 | 21.2
| TSI | 13.7 | 45.1 | 41.2
| HapMapRevision=28
}}{{PMID Auto
|PMID=22461898
|Title=A 3' UTR SNP in COL18A1 Is Associated with Susceptibility to HBV Related Hepatocellular Carcinoma in Chinese: Three Independent Case-Control Studies
|OA=1
}}

{{PMID Auto
|PMID=12415512
|Title=Molecular analysis of collagen XVIII reveals novel mutations, presence of a third isoform, and possible genetic heterogeneity in Knobloch syndrome.
|OA=1
}}

{{PMID Auto
|PMID=22450926
|Title=Genetic polymorphisms in key methotrexate pathway genes are associated with response to treatment in rheumatoid arthritis patients.
}}

{{PMID Auto
|PMID=25124723
|Title=SLC19A1, SLC46A1 and SLCO1B1 Polymorphisms As Predictors Of Methotrexate-Related Toxicity In Portuguese Rheumatoid Arthritis Patients
}}
{{on chip | 23andMe v1}}
{{on chip | 23andMe v2}}
{{on chip | 23andMe v3}}
{{on chip | 23andMe v4}}
{{on chip | FTDNA2}}
{{on chip | HumanOmni1Quad}}
{{on chip | Illumina Human 1M}}