	static function excel_export() {
		if (! isset ( $_POST ['excel'] )) {
			return;
		} else {
			// dataSetName: Infections, Punction
			$dataSetName = $_POST ['dataSetName'];
			$classname = '\Hospitalplugin\utils\ExcelExport' . $dataSetName;
		}
		
		$objPHPExcel = new \PHPExcel ();
		$classname::fillData ( $objPHPExcel );
		
		ExcelExport::downloadExcel ( $objPHPExcel, $dataSetName . '.xlsx' );
	}