/**
  * Fetch PatientSecundair's which this TpProject references.
  * `tp_project`.`id` -> `patient_secundair`.`project`
  *
  * @param PDO $db a PDO Database instance
  * @param array $sort array of DSC instances
  * @return PatientSecundair[]
  */
 public function fetchPatientSecundairCollection(PDO $db, $sort = null)
 {
     $filter = array(PatientSecundair::FIELD_PROJECT => $this->getId());
     return PatientSecundair::findByFilter($db, $filter, true, $sort);
 }