Reply to Sven Brandau and Henrik Suttmann's Letter to the Editor re: Salvatore Siracusano, Francesca Vita, Rita Abbate, Stefano Ciciliato, Violetta Borelli, Massimiliano Bernabei and Giuliano Zabucchi. The Role of Granulocytes Following Intravesical BCG Prophylaxis. Eur Urol 2007;51:1589-9