In this study 32 patients whom had only one superficial bladder tumor (T. -T1 stage) were selected to investigate the effectiveness of either BCG of Alfa-Interferon in preventing the recurrence of tumor. The other aim of this study was to compare the ideal regiment for the patient. These patients previously had neither tumor nor immunotherapy. https://www.roneverhart.com/Mackie-ProFX16v3-16-channel-Mixer-with-USB-and-Effects-p14934/