Task: Answer Verification
Input (English): Question: Are low serum 25-hydroxyvitamin d concentrations associated with increased risk for melanoma and unfavourable prognosis?
Answer: Our data support the concept that serum 25(OH)D concentrations are associated with risk and prognosis of melanoma. Whether normalizing serum 25(OH)D concentrations in these patients improves outcomes will require testing in future clinical trials.
Output (English): yes