public function getPostop_instructions_list()
{
$criteria = new CDbCriteria();
$criteria->addCondition('subspecialty_id = :subspecialtyId and site_id = :siteId');
$criteria->params[':subspecialtyId'] = Firm::model()->findByPk(Yii::app()->session['selected_firm_id'])->serviceSubspecialtyAssignment->subspecialty_id;
$criteria->params[':siteId'] = Yii::app()->session['selected_site_id'];
$criteria->order = 'display_order asc';
return CHtml::listData(OphTrOperationnote_PostopInstruction::model()->findAll($criteria), 'id', 'content');
}