protected function checkPatient($patientNr, $orgId)
    {
        if (! ($patientNr && $orgId)) {
            return false;
        }

        $select = $this->db->select();
        $select->from('gems__respondent2org', array('gr2o_id_user'))
            ->where('gr2o_patient_nr = ?', $patientNr)
            ->where('gr2o_id_organization = ?', $orgId);

        return $this->db->fetchOne($select);
    }