I think there are a number of ways or considerations regarding how to protect the athletes further. I don't think there is, as yet, consensus on what those would be. I might suggest things like taking objective measures of baseline brain or cognitive function prior to participation as well as doing testing at regular intervals, not just after a competition but on an ongoing basis. There is evolving science in diagnostic imaging that is still at, really, a research stage at this point, or an early clinical stage, that may shed some light on injury.
Part of the challenge with brain injury is that things like a CT scan provide you structural information but not necessarily functional information on how the brain is functioning. Some of the newer MRI technologies and quantitative electroencephalogram technologies will provide an objective measure of function as will applying these on a regular basis over time.
Part of the challenge with athletes in these competitions is that there is no way to truly, objectively, judge injury and whether they're at ongoing risk or severe risk. We have to find objective ways to measure and apply these standards rigorously and perhaps even limit the duration of competition. Muhammad Ali had a large number of fights in his career. Perhaps a top limit should be applied. These are things that are just opinion-based at this stage, but those are all ways that we could consider reducing the rates of injury.