There are some articles on ncbi.nlm.nih.gov which can help you on this. Again, for more intensive research, you can refer to the reference materials provided at the bottom of the articles.
You can refer different news articles on the web, where you can find expert's comments on this issue.
There are also some government research in this areas, which you can find on the government websites.
Watch some youtube videos where you can find the expert's take on this issue.
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