🔧 add vcf_source for #555
🔧 add vcf_source for #555

OpenHumans/open-humans,OpenHumans/open-humans,PersonalGenomesOrg/open-humans,OpenHumans/open-humans,PersonalGenomesOrg/open-humans,PersonalGenomesOrg/open-humans,OpenHumans/open-humans,PersonalGenomesOrg/open-humans