I'm glad you linked competition, so we can compare similar industries for reference (I asked a very similar thing about Watson.) One item that stood out on their site:

Dr. Gordon Guyatt from McMaster University, who coined the term "evidence-based medicine," makes 6-8 visits to UpToDate per year to work with UpToDate editors. Watch him in action with our physician editors as they review and analyze medical evidence that informs UpToDate graded recommendations.

http://www.uptodate.com/home/editorial

And I was also able to find their methods for that grading as well, in case anyone wants to compare Meta Research Methods across Meta Research Organizations:

http://www.uptodate.com/home/grading-guide