* Abstract of the McCann et al. (2007) study of effect of azo-dyes on ADHD childrens: http://www.thelancet.com/journals/lancet/article/PIIS0140673607613063/abstract | * Abstract of the McCann et al. (2007) study of effect of azo-dyes on ADHD childrens: http://www.thelancet.com/journals/lancet/article/PIIS0140673607613063/abstract |