Studies have confirmed the single or combined application of exogenous cytokines at wound site can accelerate wound tissue repair.

研究证实，创伤局部单独或联合给予适量外源性生长因子可加速创伤组织的愈合。

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Studies that go beyond a single site are often able to recruit more individuals from diverse populations. These multi-site studies can often generate important results in less time.

多中心的临床试验可以在更广泛的人群中获得受试者，并且也能在相对较短的时间内获得临床上的重要结果。

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