South Africa's World Cup-winning captain Siya Kolisi, in a wide-ranging BBC Sport interview, says he doesn't want people to think he's "flawless" and talks about "fighting battles" with alcohol.
A mystery blood infection left Wales and Scarlets forward Aaron Shingler wondering if he would ever walk again.
The BBC's rugby union correspondent Chris Jones answers some of the key questions as the sport faces renewed concerns about the impact of concussion.
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