##fileformat=VCFv4.1
##fileDate=20090805
##source=myImputationProgramV3.1
##reference=1000GenomesPilot-NCBI36
##phasing=partial
##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
##FORMAT=<ID=AO,Number=A,Type=Integer,Description="Alternate allele observation count">
#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	NA00001	NA00002	NA00003
21	4242421	.	T	A	30	.	.	GT:AO	0|0:0.1	0|1:0.2	0/0:0.3