The best medical AI research (that you probably haven't heard of)

I've been talking in recent posts about how our typical methods of testing AI systems are inadequate and potentially unsafe. In particular, I've complained that all of the headline-grabbing papers so far only do controlled experiments, so we don't how the AI systems will perform on real patients. Today I am going to highlight a piece of work that has not received much attention, but actually went "all the way" and tested an AI system in clinical practice, assessing clinical outcomes. They did an actual clinical trial! Big news … so why haven't you heard about it?