public function getComments($factor_id, $element_id)
{
$criteria = new \CDbCriteria();
$criteria->select = 'comments';
$criteria->condition = "element_id=:element_id";
$criteria->addCondition("patient_factor_id=:patient_factor_id");
$criteria->params = array(':element_id' => $element_id, ':patient_factor_id' => $factor_id);
$item = OphCoCvi_ClericalInfo_PatientFactor_Answer::model()->find($criteria);
return $item['comments'];
}