Although the methodological approaches are similar, the questions posed in classic epidemiology and clinical epidemiology are different.

尽管方法学方法相似，但经典流行病学和临床流行病学中提出的问题是不同的。

However, the authors urge caution before such a conclusion can be confirmed, citing methodological limitations (including small sample sizes) among the studies they reviewed.

然而，作者以他们审的研究中的方法学局限性（样本量）为由， 敦促在确认这样的结论之前保持谨慎。

The methodological difficulty associated with systematically identifying and keeping track of shifts in narrative structures across extended bodies of text remains a concern for researchers working in this area .

与系统地识别和跟踪扩展文本主体中叙述结构的变化相关的方法学困难仍然是该领域研究人员关注的问题。