Task: Answer Verification
Input (English): Question: Is rANK/OPG ratio of expression in primary clear-cell renal cell carcinoma associated with bone metastasis and prognosis in patients treated with anti-VEGFR-TKIs?
Answer: RANK/OPG ratio of expression in primary ccRCC is associated with BM and prognosis in patients treated with anti-VEGFR-TKIs. Prospective validation is warranted.
Output (English): yes