import re


def fix_multiallelics(cell):
    """
    bcftools doesn't complete splitting of multiallelic variant sites.
    :param cell: genotype, str.
    :return: genotype as is if not multiallelic otherwise split multiallelic genotype, str.
    """
    splitters = [',', ';']
    if any(splitter in str(cell) for splitter in splitters):
        cell = re.split(';|,', cell)[0]
    return cell