最可靠的证据来自大型人体的试验- 最好是与服用安慰剂进行对比的随机治疗试验。
The most reliable evidence comes from large human trials – preferably randomised trials in which the treatment is compared to a placebo.
这家公司目前声称，已有培养细胞治疗的试验证据表明这种治疗方法并没有引起有害的免疫反应，但现仍没有透露试验的具体细节。
The company now says it has evidence from cell-culture experiments that the treatment will not cause harmful immune reactions, though it has yet to release details of the research.
从两组小试验中，有限的证据指出低强度的雷射治疗减缓口腔黏膜炎的严重性。
There is limited evidence from two small trials that low level laser treatment reduces the severity of the mucositis.
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