protected function getLookup($respondentId = null, $organizationId = null)
    {
        if ($respondentId !== null && $organizationId !== null) {

            $respondentTracks = $this->loader->getTracker()->getRespondentTracks($respondentId, $organizationId);

            $respondentTrackPairs = [];
            foreach($respondentTracks as $respondentTrack) {
                $name = $respondentTrack->getTrackName();
                $startDate = $respondentTrack->getStartDate();
                if ($startDate) {
                    $name .= ' (' . $startDate->toString('dd-MM-yyyy') . ')';
                }
                $respondentTrackPairs[$respondentTrack->getRespondentTrackId()] = $name;
            }

            return $respondentTrackPairs;
        }
        return [];
    }