Anumberofscientificstudieshavesuggestedthatrepeatedlyhe...
問題詳情：Anumberofscientificstudieshavesuggestedthatrepeatedlyheadingafootballcouldincreasetheriskofdevelopingdementia(痴呆症)inlaterlife.In2002,formerEnglandinternationalfootballerJeffAstlediedaged59....