There are some major inaccuracies in the way biomedical research is presented in this article. For one, in nearly every mouse study, confirmatory studies are also carried out in human tissue cultures (Hela cells are a famous example), which are completely absent from their pie chart.

Secondly, the article completely ignores sequencing efforts - an astonishing oversight in my opinion. Obviously, we can't do genetic studies on humans, but inexpensive exome sequencing is rapidly allowing us to do observational studies in humans.