public function listAction()
{
$data = array();
$psd = new PatientStatisticsDefinition();
$psdIterator = $psd->getIterator();
foreach ($psdIterator as $row) {
$data[] = $this->_generateStatsRow($row);
}
$json = Zend_Controller_Action_HelperBroker::getStaticHelper('json');
$json->suppressExit = true;
$json->direct(array('rows' => $data));
}
