Their youthful brains were developing normally, with no signs of developmental, psychological or neurological problems. None had ever had a concussion. But by the end of a single football season, 24 children between the ages of 9 and 18 who had more frequent impacts to the head showed signs of damage to brain development, new research says.


원문출처 : https://www.cnn.com/2018/11/26/health/youth-football-brain-impact-study/index.html