Improve the grammaticality of this text: For example, there are scientists who have created fruit flies that are able to live of their normal life spans and thus have made old human cells behave like youth human cells again.
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The authors of the paper have not yet published a paper on the topic.
The authors of the paper have not yet published a paper on the topic.
The authors of the paper have not yet published a paper on the topic.
The authors of the paper have not yet published a paper on the topic.
The authors of the paper have not yet published a paper on the topic.
The authors of the paper have not yet published a paper on the topic.
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