The clinical and immunological efficacy of preseasonal allergoid immunotherapy has been previously investigated, however, studies comparing the effectiveness of the two protocols are limited in the literature.

中文翻译：

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草花粉过敏患者常年和季节性过敏原免疫疗法的比较。

先前已经研究了季前过敏性免疫疗法的临床和免疫学疗效，但是，比较这两种方案有效性的研究在文献中是有限的。