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: Is acetylcholine-induced constriction of angiographically normal coronary arteries time dependent in transplant recipients . Effects of stepwise infusion at 1 , 6 , 12 and more than 24 months after transplantation?
Answer: This study indicates that the acetylcholine response is persistently abnormal in transplant recipients compared with that in normal control subjects and that this abnormality may not be related simply to the presence of atherosclerosis. Thus, acetylcholine may not be a useful tool for early detection of coronary atherosclerosis in heart transplant recipients.
A:
no