This sounds like it used an approach similar to meta-analyses (similar to Cochrane Reviews in clinical research), which were then manually reviewed. Meta-analy

This sounds like it used an approach similar to meta-analyses (similar to Cochrane Reviews in clinical research), which were then manually reviewed. Meta-analysis one of the areas I would expect machine learning to become competent. Pro-actively approaching researchers, rather than hoping they will submit a grant application to your own organization, is also a very innovative approach that I would like to see happen more often.