The biggest hits in contact sports are no longer taking place on the field, but in the pages of scientific journals, reports Dylan Cleaver, in the final of a three-part series.

"Dear James Graham," begins a recent piece by former Wallaby-turned-writer Peter FitzSimons, prefacing an open letter where he praises the St George hardman for engaging in the CTE debate before chiding him for cherry-picking bad science.

It was a culmination of a tete-a-tete between player and columnist, which boiled down to Graham believing the spectre of brain disease as a result of sports injuries has been overstated, while

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