def add_tabix_subparser(subparser):
    """
    Get commandline arguments
    Args:
        subparser (?): Subparser object.
    Returns:
        args (Namespace): the parsed arguments.
    """
    parser = subparser.add_parser("tabix", help="Tabix subparser")
    parser.add_argument("-vcf", "--variant-call-file", dest="vcf",
                        help="Tabix indexed VCF.")
    parser.add_argument("-in", "--primer-input-file", dest="p_info",
                        help="The output of the primer pipeline.")
    parser.add_argument("-o", "--output", dest="output",
                        help="The name of the output file")
    return parser