目前在美国，疗效比较研究（Comparative Effectiveness Research, CER）是一个热的发烫的名词，因为很多人相信CER能在提高医疗质量的同时，减少医疗费用的支出。
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同时观察了针刺对其的干预作用，并进行了不同针法的疗效比较研究。
The intervening effects of acupuncture on them were studied and the curative effects with different acupuncture therapy methods were compared.
我们进行了一项双盲，多中心研究，比较了美沙美拉明与美沙酮对安慰剂治疗活动性溃疡性结肠炎的疗效。
We performed a double-blind, multicenter study, comparing MMX mesalamine vs placebo for the treatment of active ulcerative colitis.
需要随机研究比较冰冻球囊消融和传统的射频电流能量，以评估两者的疗效、并发症和性价比。
Randomized studies comparing cryoballoon ablation with conventional radiofrequency current energy will be necessary to assess efficacy, complications, and cost-efficacy.
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