The database of our results is available to the public through our website at http://www.hsph.harvard.edu/faculty/liming-liang/software/eqtl/. The gene expression data for the MRCA and MRCE cohorts are available through the European Bioinformatics Institute (EBI) (http://www.ebi.ac.uk) under accession number E-MTAB-1425 for MRCA, and accession number E-MTAB-1428 for MRCE. The genotyping data for the subjects is accessible through the European Genome-Phenome Archive (EGA) (https://www.ebi.ac.uk/ega/), which is also hosted by the European Bioinformatics Institute (accession number EGAS00000000137 for both MRCA and MRCE samples).