I am working with human whole genome sequence. I have called variant using samtools and I have annotated my VCF file using SnpEff. In the resultant file I have got only the Ensembl gene and transcript IDs. According to SnpEff documentations, SnpEff supports RefSeq as well, but I am not getting any RefSeq gene or transcript ID. How can I annotate my VCF using SnpEff so that I will get RefSeq gene and transcript IDs for individual variants? Please, help me with this.