# cis-eQTL
# --------
  group:
    AA (African American)
    PR (Puerto Rican)
    MX (Mexican American)
    All (Pooled)
    AFRHp5 (AFR high)
    AFRLow (AFR low) 
    IAMHp5 (IAM high)
    IAMLow (IAM low)
  
  files:
    AA.cis-eQTL.tar.gz
    PR.cis-eQTL.tar.gz
    MX.cis-eQTL.tar.gz
    All.cis-eQTL.tar.gz
    AFRHp5.cis-eQTL.tar.gz
    AFRLow.cis-eQTL.tar.gz
    IAMHp5.cis-eQTL.tar.gz
    IAMLow.cis-eQTL.tar.gz

  gene_id: gene ID from GENCODE v30
  variant_id: variant ID in dbsnp150 or chr:pos:ref:alt(b38) format
  tss_distance: distance between variant_ID and TSS of gene
  ma_samples: number of samples that contains the minor allele
  ma_count: minor allele count
  maf: minor allele frequency
  pval_nominal: p-value
  slope: effect size relative to the alternative allele
  slope_se: standard error of the effeice size
  qval: per-gene qvalue (BH corection) calculated from beta-approximated p-value
  pval_nominal_threshold: per-gene nominal p-value threshold as described in https://github.com/francois-a/fastqtl/blob/master/doc/pages/cis_permutation.html
  eQTL.flag: TRUE (is an eQTL) if pval_nominal < pval_nominal_threhold
  vid2: variant ID in the format of chr<chr>_<position>_<ref>_<alt>_b38
  
# trans-eQTL
# ----------
  
  self-identified-race-ethnicty.out.trans.eQTL.set.freq.final.noChrX.PUB.txt.gz
      A union of all trans-eQTL from AA, PR, MX and pooled groups and ALT allele frequency
      If <group>.P is not NA, the varaint-gene pair is a trans-eQTL-eGene pair
  
  anc-high-low.out.trans.eQTL.set.freq.final.noChrX.PUB.txt.gz
      A union of AFR high and IAM high filtered trans-eQTL (see definition in methods) and ALT allele frequency
      If AFRHp5.P or IAMHp5 is not NA, the variant-gene pair is a trans-eQTL-eGene pair in the AFR high or IAM high group

  geneid: gene ID from GENCODE v30
  geneChr: chromosome where the gene is located
  vid: variant ID in the format of b38:chr:pos:ref:alt
  ID: variant ID in dbsnp150 or chr:pos:ref:alt(b38) format
  X.CHROM: chromosome where the variant is located
  POS: variant position
  REF: REF allele
  ALT: ALT allele
  geneName: gene name from GENCODE v30
  <group>.BETA: effect size relative to the ALT allele
  <group>.SE: standard error of effect size
  <group>.P: P value from PLINK linear regression using inverse normalized gene expression as outcome (as described in methods)
  <group>.afreq: ALT allele frequency
  
  group:
    AA (African American)
    PR (Puerto Rican)
    MX (Mexican American)
    AFRHp5 (AFR high)
    AFRLow (AFR low) 
    IAMHp5 (IAM high)
    IAMLow (IAM low)

# predictdb (TWAS models)
# -----------------------
  TWAS models that can be used by PrediXcan or eqivalent

  gala.sage.<group>_Whole_Blood_tw_0.5_signif.db.weight.sorted.vcf.gz
    A file providing the chromosome, chromosome position, reference and alternate allele in hg38 for mapping variant ID in other formats to varaint ID used in our TWAS models
    ID = variant ID used in the models