This question was also asked on Biostars
In other words, are NCBI37 and hg19 synonymous? I can't find much information for what NCBI37 is in a human (not mouse) genome.
The VCF is from a lab sequencing human genomes, and they're no longer able to be reached out to. I can't provide a link to NCBI37 because I don't know what it is and I can't find much information on it.
Relevant line from VCF: "##reference=NCBI37"
Here is part of the VCF header:
##fileformat=VCFv4.2
##source=apt-format-result:2.10.2
##reference=NCBI37
##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
##contig=<ID=1>
##contig=<ID=10>
##contig=<ID=11>
##contig=<ID=12>
##contig=<ID=19> [omitted some chromosomes for brevity]
##contig=<ID=2>
##contig=<ID=20>
##contig=<ID=MT>
##contig=<ID=X>
##contig=<ID=Y>