I have never seen this in Google SERPs before?
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What is this that I am seeing in the Google SERPs? It's a bank of 3 separate articles from one site, but they are grouped together like an organic listing.
Checkout the link to see what I'm talking about http://imgur.com/xbUk1NG
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What you are seeing is google showing you specific papers on cancer trials and how many other papers have cited these trials. It is an organic listing. It is part of the Google Scholar search engine https://scholar.google.com/schhp?hl=en&as_sdt=5,31&sciodt=0,31
You can read more about google scholar here https://scholar.google.com/intl/en/scholar/about.html
Thanks,
Don