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.

[EX Q]: Question: Is cardiovascular variability similarly altered in coronary patients with normal left ventricular function and in heart failure patients?
Answer: Our study shows that in coronary patients with no MI and no left ventricular dysfunction, there is a profound alteration of both HR and BP variability as in CHF patients, presumably because of a marked impairment of the autonomic modulation of the heart and blood vessels.
[EX A]: yes

[EX Q]: Question: Does fK778 attenuate cytomegalovirus-enhanced vein graft intimal hyperplasia in a rat model?
Answer: These data suggest a role of CMV in venous graft failure. Also, our results suggest a prospective role for the new immunosuppressive drug FK778 in the prevention of (CMV-mediated) vein graft intimal hyperplasia.
[EX A]: yes

[EX Q]: Question: Does humeral windows and longitudinal split for component removal in revision shoulder arthroplasty?
Answer: In both groups, there were no cases of malunion or clinical loosening. These data suggest that windows and longitudinal splits facilitate controlled removal of well-fixed components with high rate of union and low rate of intraoperative or postoperative sequelae.
[EX A]:
yes