Adjuvants Immunologic/*administration & dosage/adverse effects Administration Intravesical Antineoplastic Agents/*administration & dosage/adverse effects BCG Vaccine Carcinoma in Situ/mortality/pathology/*therapy Combined Modality Therapy/adverse effects/methods Disease Progression Drug Administration Schedule Humans Interferon-alpha/*administration & dosage/adverse effects Neoplasm Recurrence Local Randomized Controlled Trials as Topic Time Factors Urinary Bladder Neoplasms/mortality/pathology/*therapy Withholding Treatment/statistics & numerical data