it's very hard to say. In america we are really far behind and only just recently started to pay attention to concussions in football, let alone boxing. I mentioned The Ring magazine doing a piece of this matter not long ago, and one doctor thought boxers should sit out from 6 months to a year at least after suffering a KO.
again it's hard to say and more research and data is needed.
again it's hard to say and more research and data is needed.

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