def export_verified_variants(aggregate_variants, unique_callers):
    """Create the lines for an excel file with verified variants for
        an institute

        Args:
            aggregate_variants(list): a list of variants with aggregates case data
            unique_callers(set): a unique list of available callers

        Returns:
            document_lines(list): list of lines to include in the document
    """
    document_lines = []
    for variant in aggregate_variants:
        # get genotype and allele depth for each sample
        samples = []
        for sample in variant['samples']:
            line = [] # line elements corespond to contants.variants_export.VERIFIED_VARIANTS_HEADER
            line.append(variant['institute'])
            line.append(variant['_id']) # variant database ID
            line.append(variant['category'])
            line.append(variant['variant_type'])
            line.append(variant['display_name'][:30]) # variant display name
            # Build local link to variant:
            case_name = variant['case_obj']['display_name']  # case display name
            local_link = '/'.join([ '', variant['institute'], case_name, variant['_id'] ])
            line.append(local_link)
            line.append(variant.get('validation'))
            line.append(case_name)
            case_individual = next(ind for ind in variant['case_obj']['individuals'] if ind['individual_id'] == sample['sample_id'])
            if case_individual['phenotype'] == 2:
                line.append(' '.join([sample.get('display_name'),'(A)'])) # label sample as affected
            else:
                line.append(sample.get('display_name'))
            line.append(''.join(['chr',variant['chromosome'],':',str(variant['position'])])) # position
            line.append('>'.join([variant.get('reference')[:10],variant.get('alternative')[:10]])) # change
            genes = []
            prot_effect = []
            funct_anno = []
            for gene in variant.get('genes'): # this will be a unique long field in the document
                genes.append(gene.get('hgnc_symbol',''))
                funct_anno.append(gene.get('functional_annotation'))
                for transcript in gene.get('transcripts'):
                    if transcript.get('is_canonical') and transcript.get('protein_sequence_name'):
                        prot_effect.append(urllib.parse.unquote(transcript.get('protein_sequence_name')))
            line.append(','.join(prot_effect))
            line.append(','.join(funct_anno))
            line.append(','.join(genes))
            line.append(variant.get('rank_score'))
            line.append(variant.get('cadd_score'))
            line.append(sample.get('genotype_call'))
            line.append(sample['allele_depths'][0])
            line.append(sample['allele_depths'][1])
            line.append(sample['genotype_quality'])

            # Set callers values. One cell per caller, leave blank if not applicable
            for caller in unique_callers:
                if variant.get(caller):
                    line.append(variant.get(caller))
                else:
                    line.append('-')
            document_lines.append(line)
    return document_lines
Create the lines for an excel file with verified variants for
        an institute

        Args:
            aggregate_variants(list): a list of variants with aggregates case data
            unique_callers(set): a unique list of available callers

        Returns:
            document_lines(list): list of lines to include in the document