These were also likely to have more serious symptoms of ADHD than their right-handed counterparts. It is estimated that ADHD affects between 3 to 9 % of school-aged children and young people. The adolescents also reported having greater difficulties with language than those that were left – or right-handed. This is in line with earlier studies which have linked mixed-handedness with dyslexia. Little is known in what makes people mixed-handed but it is known that handedness is linked to the hemispheres in the mind. Previous research has shown that in which a person’s natural choice is for utilizing their right hands, the left hemisphere of their brain is more dominant.This is among the first positive randomized vaccine trials in cancer and the results represent a significant step of progress for treatment of advanced melanoma, said Schwartzentruber. Nevertheless, the vaccine only could be given to half of those with melanoma because it has to match a patient’s tissue type, or HLA. A major priority for all of us is to determine ways to broaden our strategy and use mixtures of peptides, for example, in order that more patients meet the criteria.