private function handleSubspecialtyListFilter(\CDbCriteria $criteria, $filter = array())
{
if (array_key_exists('subspecialty_id', $filter) && $filter['subspecialty_id'] !== '') {
$criteria->addCondition('subspecialty.id = :subspecialty_id');
$criteria->params[':subspecialty_id'] = $filter['subspecialty_id'];
}
}