Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.
Q: Question: Does treatment of ankylosing spondylitis with TNF inhibitors have adverse effect on results of liver function tests : a longitudinal study?
Answer: TNFi use-associated rises in hepatic enzymes were determined compared to pre-treatment but the mean values remained within normal limits. Considering the cases in the literature, in daily practice patients must be carefully monitored for liver function before treatment and at follow-up.
A:
no