/**
  * Get the medical center collection that will be updated.
  *
  * @param $overwrite
  *
  * @return mixed
  */
 protected function getMedicalCenterCollection($overwrite)
 {
     if ($overwrite) {
         $mcCollection = $this->medicalCenter->getAllButUnknownMedicalCenter();
         return $mcCollection;
     } else {
         $mcCollection = $this->medicalCenter->getWithTokenNotSetButUnknownMedicalCenter();
         return $mcCollection;
     }
 }