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BAGSHOT, ENGLAND - NOVEMBER 10: Joost van der Westhuizen the former South African Sprinbok, who is suffering with Motor Neurone Disease poses with England scrumhalfs Richard Wigglesworth (L), Danny Care and Ben Youngs (R) after the England training session held at Pennyhill Park on November 10, 2014 in Bagshot, England. (Photo by David Rogers/Getty Images)

BAGSHOT, ENGLAND - NOVEMBER 10:  Joost van der Westhuizen the former South African Sprinbok, who is suffering with Motor Neurone Disease poses with England scrumhalfs Richard Wigglesworth (L), Danny Care and Ben Youngs (R) after the England training session held at Pennyhill Park on November 10, 2014 in Bagshot, England.  (Photo by David Rogers/Getty Images)

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Joost van der Westhuizen of South Africa passes the ball during a pool stage match against Australia in the Rugby World Cup at Newlands, Cape Town, South Africa, 25th May 1995. South Africa won the match 27-18. (Photo by Clive Mason/Getty Images)

Joost van der Westhuizen of South Africa passes the ball during a pool stage match against Australia in the Rugby World Cup at Newlands, Cape Town, South Africa, 25th May 1995. South Africa won the match 27-18. (Photo by Clive Mason/Getty Images)

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PARIS, FRANCE - FEBRUARY 12: The teams applaud in honour of Joost van der Westhiuzen of South Africa, who passed away earlier this week during the RBS Six Nations match between France and Scotland at Stade de France on February 12, 2017 in Paris, France. (Photo by Richard Heathcote/Getty Images)

PARIS, FRANCE - FEBRUARY 12:  The teams applaud in honour of Joost van der Westhiuzen of South Africa, who passed away earlier this week during the RBS Six Nations match between France and Scotland at Stade de France on February 12, 2017 in Paris, France.  (Photo by Richard Heathcote/Getty Images)

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Former South African Rugby World Cup winner team Captain Francois Pienaar (L) assists former teammate flyhalf Joost van der Westhuizen (C), during a re-enactement of the team photo from the 1995 Rugby World cup victory on June 24, 2015 at Ellis Park in Johannesburg. Joost van der Westhuizen has been affected by the onset of the motor neurone disease, Amyotrophic Lateral Sclerosis. AFP PHOTO/GIANLUIGI GUERCIA (Photo credit should read GIANLUIGI GUERCIA/AFP/Getty Images)

Former South African Rugby World Cup winner team Captain Francois Pienaar (L) assists former teammate flyhalf Joost van der Westhuizen (C), during a re-enactement of the team photo from the 1995 Rugby World cup victory on June 24, 2015 at Ellis Park in Johannesburg.  Joost van der Westhuizen has been affected by the onset of the motor neurone disease, Amyotrophic Lateral Sclerosis.   AFP PHOTO/GIANLUIGI GUERCIA        (Photo credit should read GIANLUIGI GUERCIA/AFP/Getty Images)

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Joost van der Westhuizen of South Africa (arm raised) at the final whistle of the Rugby Union World Cup Final between South Africa and the New Zealand All Blacks at Ellis Park in Johannesburg on 24th June 1995. South Africa won 15-12. (Photo by Chris Smith/Popperfoto via Getty Images/Getty Images)

Joost van der Westhuizen of South Africa (arm raised) at the final whistle of the Rugby Union World Cup Final between South Africa and the New Zealand All Blacks at Ellis Park in Johannesburg on 24th June 1995.  South Africa won 15-12. (Photo by Chris Smith/Popperfoto via Getty Images/Getty Images)