public function attributeLabels()
{
return array('id' => 'ID', 'event_id' => 'Event', 'patient_id' => 'Patient', 'study_id' => 'Study ID', 'device_id' => 'Devide unique ID', 'device_name' => 'Device name', 'device_model' => 'Device model', 'device_manufacturer' => 'Device manufacturer', 'device_software_version' => 'Device software version');
}