Task: Answer Verification
Input (English): Question: Are outcomes after intravesical bacillus Calmette-Guerin affected by substaging of high grade T1 transitional cell carcinoma?
Answer: Substaging of T1 tumors did not affect response to BCG in regard to recurrence or progression. Therefore, intravesical BCG is effective for stages T1a and T1b disease.
Output (English): no