instruction:
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.
question:
Question: Does long-term treatment with methotrexate or tumor necrosis factor alpha inhibitors increase epstein-barr virus load in patients with rheumatoid arthritis?
Answer: Long-term usage of methotrexate or TNFalpha inhibitors in patients with RA does not significantly influence EBV load in PBMCs.
answer:
no


question:
Question: Is prooxidant-anti-oxidant balance associated with extent of coronary artery disease?
Answer: In conclusion, we found higher levels of oxidative stress in CAD+ patients compared to healthy subjects. The oxidation level was not related to measures of the extent of CAD such as number of stenosed vessels.
answer:
no


question:
Question: Is itching a significant problem and a mediator between disease severity and quality of life for patients with psoriasis : results from a randomized controlled trial?
Answer: Pruritus appears to be an important mediator of the association between improvements in disease severity and HRQOL in patients with moderate-to-severe psoriasis.
answer:

yes