protected function loadTrackSettings()
    {
        $respTracks = $this->tracker->getRespondentTracks(
                $this->formData['gto_id_respondent'],
                $this->formData['gto_id_organization']
                );
        $tracks = array();
        foreach ($respTracks as $respTrack) {
            if ($respTrack instanceof \Gems_Tracker_RespondentTrack) {
                if ($respTrack->hasSuccesCode()) {
                    $tracks[$respTrack->getRespondentTrackId()] = substr(sprintf(
                            $this->_('%s - %s'),
                            $respTrack->getTrackEngine()->getTrackName(),
                            $respTrack->getFieldsInfo()
                            ), 0, 100);
                }
            }
        }
        if ($tracks) {
            if (! isset($this->formData['gto_id_track'])) {
                reset($tracks);
                $this->formData['gto_id_track'] = key($tracks);
            }
        } else {
            $this->addMessageInvalid($this->_('Survey insertion impossible: respondent has no track!'));
            $tracks = $this->util->getTranslated()->getEmptyDropdownArray();
        }
        asort($tracks);
        $model = $this->getModel();
        $model->set('gto_id_track', 'multiOptions', $tracks);
        if (count($tracks) === 1) {
            $model->set('gto_id_track', 'elementClass', 'Exhibitor');
        }

        if (isset($this->formData['gto_id_track'])) {
            $this->respondentTrack = $respTracks[$this->formData['gto_id_track']];

            // Add relation field when survey is not for staff
            if ($this->survey && $this->survey->isTakenByStaff() === false) {
                $engine = $this->respondentTrack->getTrackEngine();
                if (method_exists($engine, 'getRespondentRelationFields')) {
                    $empty = array('-1' => $this->_('Patient'));
                    $relations = $empty + $engine->getRespondentRelationFields();
                    $model->set('gto_id_relationfield', 'label', $this->_('Fill out by'),
                        'multiOptions', $relations, 'elementClass', 'Select',
                    'required', true);
                }
            }
        }
    }