We have performed a large genome-wide association study in a few thousand ankylosing spondylitis patients and need to replicate several promising genetic associations. Although we have genotyped putatively associated SNPs in a new sample of cases, we need to obtain genotype data from a similarly sized european control sample on ~100 candidate SNPs. Since both cohorts have been genotyped on the Illumina 317K SNP chip, the ~1700 ALSPAC individuals for whom genome-wide SNP data is now available would be an obvious choice. Note that we are requesting a small number of candidate SNPs (i.e. ~100 SNPs) NOT the entire genome-wide dataset.