 The control group ultimately consisted of 59 children (29 boys and 30 girls).Of the total of 141 children, 42 (33 boys and 9 girls) were diagnosed as having MBD/DAMP; of the 42, 40 were in the index group (18 in the high-index group) and 2 in the control group.All the children were initially age 6–7 (born 1971) and were from Gothenburg, Sweden.