Alan Shearer investigates whether heading a football is linked to the development of dementia.
Alan Shearer ,
Dawn Astle ,
Jeff Astle ,
Jennie Cartwright ,
Charlotte Cowie ,
Caroline Crosbie ,
Tom Di Virgilio ,
David Donaldson ,
Chelsea F.C. ,
Newcastle United F.C. ,
Les Ferdinand ,
Michael Grey ,
Lindsay Horton ,
Angus Hunter ,
Tony Jameson-Allen
