Science and democracy, when museums were the source of scientific education, and what's the real deal with Prevagen?
Ethologists, videographers and economists have all studied the behavior of surgeons in the operating room. Their revelations will not surprise surgeons, and they do not require the trappings of p-values and statistics. 
Reductionism is the basis for most science. Since so many factors can be involved, isolating them in a lab-bench experiment can yield valuable insights. For epidemiological studies, it doesn’t work as well.