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    private function addPatientFullNameFilter(QueryBuilder $qb, ?string $fullName): void
    {
        if (null !== $fullName) {
            $qb->join('a.participants', 'p')
               ->leftJoin(
                   $this->getEntityManager()->getClassMetadata(Patient::class)->getName(),
                   'pp',
                   Join::WITH,
                   'p.id = pp.id'
               )
               ->andWhere(
                   $qb->expr()->like(
                       'unaccent(lower(' . $qb->expr()->concat('pp.firstname', $qb->expr()->literal(' '), 'pp.lastname') . '))',
                       ':fullName'
                   )
               )
               ->setParameter('fullName', '%' . mb_strtolower($this->removeAccents($fullName)) . '%');
        }
    }

    private function removeAccents(string $string): string
    {
        $normalized = \Normalizer::normalize($string, \Normalizer::FORM_D);
        return preg_replace('/[\p{Mn}]/u', '', $normalized);
    }