anchor.diff:  The GWAS Catalog contains SNP-by-SNP and SNP-by-environment interaction studies as long as the SNPs analysed meet our criteria of being genome-wide (see www.ebi.ac.uk/gwas/docs/methods). For both types of study, the term “interaction” is added in parenthesis to the reported trait. For SNP-by-environment interaction studies, the environmental component is also included in the reported trait e.g. “Lung cancer (smoking interaction)” or “Bone mineral density (gender interaction)”. For SNP-by-SNP interaction studies the term “SNP x SNP interaction” is added in parenthesis.
   To identify interaction studies, you can search for “interaction” in both the GWAS Catalog search and the download spreadsheet.
   
  -==== [[faq-B12]]12. How can I search for targeted or exome array studies and associations?
  +==== [[faq-B12]]12. How can I search for targeted and exome array studies and associations?
   
   You can enter the genotyping technology of your interest in the search bar, e.g. “targeted genotyping array”, “exome genotyping array”. This will return any study and association that uses that specific genotyping technology as reported by the authors. You can also filter results by genotyping technology as described below.
   
  
positive.code: 11. <<faq-B11,How do I identify interaction studies in the GWAS Catalog?>>
  
  
  12. <<faq-B12,How can I search for targeted or exome array studies and associations?
  >>
  
  
  
negative.code: 
  Please see the link:about[About] page for citation guidance.
  
  ==== [[faq-A4]]4. What are the te
  You can use the link:http://rest.ensembl.org/[Ensembl API] to map the SNP rsIDs in the GWAS Catalog to previous genome builds. For GRCh37 this is available at http://grch37.rest.ensembl.org/. The variation call http://grch37.rest.ensembl.org/documentation/info/variation_id can be used to retrieve the dbSNP mapping of all SNPs on GRCh37. Alternatively, you can also use https://www.ncbi.nlm.nih.gov/genome/tools/remap.
  
  ==== [[faq-A7]]7. How often are the GWAS Catalog and diagram updated?
  