British Paralympic champion Danielle Brown fears athletes with 'invisible' disabilities will suffer after rule changes.
Athletes to compete head-to-head and a new slalom event are among changes proposed for para-snowboarding.
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Video & Audio
- Watch video Three more golds for GB para-cyclists
- Watch video GB para-cyclists set world records
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- Listen to audio Gallagher overcomes nerves to win gold
- Watch video Gallagher dreamt of topping podium
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- Watch video Sochi 2014 Paralympics weather
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