only tabulate once for GT format.
only tabulate once for GT format.

harshinamdar/vcflib,ashishjain1988/vcflib,ashishjain1988/vcflib,harshinamdar/vcflib,andersje/vcflib,vcflib/vcflib,vcflib/vcflib,zeeev/vcflib,hyphaltip/vcflib,glennhickey/vcflib,jewmanchue/vcflib,ekg/vcflib,alimanfoo/vcflib,vcflib/vcflib,wzugang/vcflib,glennhickey/vcflib,andersje/vcflib,jewmanchue/vcflib,jewmanchue/vcflib,ashishjain1988/vcflib,jewmanchue/vcflib,harshinamdar/vcflib,zeeev/vcflib,glennhickey/vcflib,vcflib/vcflib,hyphaltip/vcflib,travc/vcflib,andersje/vcflib,zhmz90/vcflib,ekg/vcflib,zhmz90/vcflib,wzugang/vcflib,tomdcsmith/vcflib,zeeev/vcflib,tomdcsmith/vcflib,zhmz90/vcflib,travc/vcflib,zhmz90/vcflib,hyphaltip/vcflib,ashishjain1988/vcflib,ekg/vcflib,zeeev/vcflib,glennhickey/vcflib,vcflib/vcflib,alimanfoo/vcflib,harshinamdar/vcflib,hyphaltip/vcflib,zeeev/vcflib,vcflib/vcflib,wzugang/vcflib,ekg/vcflib,alimanfoo/vcflib,wzugang/vcflib,tomdcsmith/vcflib,jewmanchue/vcflib,glennhickey/vcflib,harshinamdar/vcflib,harshinamdar/vcflib,andersje/vcflib,ashishjain1988/vcflib,zeeev/vcflib,zhmz90/vcflib,hyphaltip/vcflib,travc/vcflib,hyphaltip/vcflib,alimanfoo/vcflib,vcflib/vcflib,vcflib/vcflib,glennhickey/vcflib,andersje/vcflib,alimanfoo/vcflib,wzugang/vcflib,wzugang/vcflib,jewmanchue/vcflib,ashishjain1988/vcflib,ekg/vcflib,andersje/vcflib,zhmz90/vcflib,alimanfoo/vcflib