Describes how imputation of four-digit HLA alleles (and associated quality metric) from measured SNP information was carried out.

This resource can be downloaded or viewed using the link: HLA_imputation.pdf

If you have wget available (typically on linux systems), then you can also obtain a copy using the command

 wget  -nd  biobank.ctsu.ox.ac.uk/ukb/ukb/docs/HLA_imputation.pdf