Subtle signs

I was never a part of the boxing debate—at least not in the ring. This was mostly because I like my brain, eyes, and ego, and I believe boxing can damage all of these. The debate, however, is making a comeback in the BMJ. This time it is about amateur boxing and the risk of chronic traumatic brain injury. This week, Mike Loosemore and colleagues report their systematic review of observational studies, which finds no strong evidence of a link (doi: 10.1136/bmj.39342.690220.55). Given the quality of published reports, it is hardly surprising that the evidence is inconclusive, says Paul McCrory …