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As long ago as January 2018, researchers at the University of Boston published a paper linking repeated hits to the head to the onset of neurodegenerative diseases. Gethin Jones speaks to his friend and former professional rugby player Dan Scarborough about his traumatic brain injury, early onset dementia and the impact it鈥檚 had on his life.

To watch this with subtitles, go to 麻豆官网首页入口 iPlayer and search for Morning Live from 29/03/21.