public function ajaxCurrentPatientStationAction()
 {
     $personId = (int) $this->_getParam('personId');
     $routing = new Routing();
     $routeIter = $routing->getIterator();
     $routeIter->setFilter(array('personId' => $personId));
     $routing = $routeIter->current();
     $json = Zend_Controller_Action_HelperBroker::getStaticHelper('json');
     $json->suppressExit = true;
     $json->direct(array($routing->stationId));
 }