His case is interesting because it raises questions about the relationship between heading the ball and CTE . A new study identifies CTE in soccer and rugby players . The findings are based on a large sample of former professional athletes who played at the highest levels from 1998 to 2010. The research raises questions about `` heading '' in soccer .
A new study identifies CTE in soccer and rugby players . The findings are based on a large sample of former professional athletes who played at the highest levels from 1998 to 2010. The research raises questions about `` heading '' in soccer .