diff --git a/script/cis-eQTL/cis-SNPs.sh b/script/cis-eQTL/cis-SNPs.sh
index a5d19f3..3bc9c84 100755
--- a/script/cis-eQTL/cis-SNPs.sh
+++ b/script/cis-eQTL/cis-SNPs.sh
@@ -11,11 +11,11 @@ awk -f low.snps.idx < $geno 1>low.Geno.data 2>err_low &
 awk -f common.snps.idx < $geno 1>common.Geno.data 2>err_common &
 
 ### SNP position (chr#, SNP pos)
-awk '{print $1,$4}' $snps_map > all.SNPpos
-awk '{print $1,$4}' rare.Geno.map > rare.SNPpos
-awk '{print $1,$4}' low.Geno.map > low.SNPpos
-awk '{print $1,$4}' common.Geno.map > common.SNPpos
+awk '{print $1,$4}' $snps_map > all.SNPpos &
+awk '{print $1,$4}' rare.Geno.map > rare.SNPpos &
+awk '{print $1,$4}' low.Geno.map > low.SNPpos &
+awk '{print $1,$4}' common.Geno.map > common.SNPpos &
 
-Rscript $SIGNET_SCRIPT_ROOT/cis-eQTL/rare.cispair.r "upstream='$upstream'" "downstream='$downstream'"
-Rscript $SIGNET_SCRIPT_ROOT/cis-eQTL/common.cispair.r "upstream='$upstream'" "downstream='$downstream'"
-Rscript $SIGNET_SCRIPT_ROOT/cis-eQTL/low.cispair.r "upstream='$upstream'" "downstream='$downstream'"
+Rscript $SIGNET_SCRIPT_ROOT/cis-eQTL/rare.cispair.r "upstream='$upstream'" "downstream='$downstream'" &
+Rscript $SIGNET_SCRIPT_ROOT/cis-eQTL/common.cispair.r "upstream='$upstream'" "downstream='$downstream'" &
+Rscript $SIGNET_SCRIPT_ROOT/cis-eQTL/low.cispair.r "upstream='$upstream'" "downstream='$downstream'" &