public function getNgTaMedicalRecord($con = null)
 {
     include_once 'lib/model/om/BaseNgTaMedicalRecordPeer.php';
     if ($this->aNgTaMedicalRecord === null && $this->ng_ta_medical_record_id !== null) {
         $this->aNgTaMedicalRecord = NgTaMedicalRecordPeer::retrieveByPK($this->ng_ta_medical_record_id, $con);
     }
     return $this->aNgTaMedicalRecord;
 }