Anumberofscientificstudieshavesuggestedthatrepeatedlyhe...
问题详情：Anumberofscientificstudieshavesuggestedthatrepeatedlyheadingafootballcouldincreasetheriskofdevelopingdementia(痴呆症)inlaterlife.In2002,formerEnglandinternationalfootballerJeffAstlediedaged59....