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: Do norepinephrine and ephedrine counteract the increase in cutaneous microcirculation induced by spinal anaesthesia?
Answer: Improved skin perfusion induced by spinal anaesthesia was not counteracted by the use of norepinephrine or ephedrine.
[A]: no


[Q]: Question: Does bone mineral density vary as a function of the rate of joint space narrowing in the hip?
Answer: Patients with a rapid rate of JSN of the asymptomatic hip after unilateral THR are characterized by elevated local and remote BMD. The local elevation in BMD implies that increased local bone density may contribute to or serve as a marker for increased risk of development of OA (assuming that JSN can be used as a predictive marker). The presence of elevated BMD in the spine suggests that there are systemic as well as local aspects of OA pathogenesis, at least in patients with one THR and rapid JSN in the contralateral hip.
[A]: yes


[Q]: Question: Is serum dipeptidyl peptidase-4 associated with multiple vertebral fractures in type 2 diabetes mellitus?
Answer: We firstly showed that high level of serum DPP-4 is associated with prevalent multiple VFs independently of BMD and bone formation in men with T2DM.
[A]:
yes