The family of a man from Sheffield killed by a blood clot after spending hours playing computer games are stepping up their campaign to save the lives of others.Chris Staniforth was 20 when he died. Now a charity's backing his father's fight to raise awareness.
Professor Beverley Hunt from the charity Lifeblood, which is a thrombosis awareness charity.
David Staniforth is calling for warnings about the dangers of extended periods of gaming to be clearly displayed on the games packaging. He is seeking support for his campaign from the computer games industry.
His campaign follows the death of his son Chris from deep vein thrombosis - he used to play computer games for up to eight hours a day.
David Staniforth's son Chris died around a year ago from Deep Vein Thrombosis. His father discovered that this can be caused by sitting still for a long time, and Chris was a big computer games player.
He has launched a campaign "Take a Break" to advise people to break up their periods of gaming, and wants warnings to be on the games packaging.