public function requiredIfNoTreatmentOther($attribute, $params)
{
$side = $params['side'];
if ($this->{$side . '_no_treatment_reason'} && $this->{$side . '_no_treatment_reason'}->other && (is_null($this->{$attribute}) || strlen(trim($this->{$attribute})) == 0)) {
$this->addError($attribute, ucfirst($side) . ' ' . $this->getAttributeLabel($attribute));
}
}