The incidence of methylphenidate use by Canadian children: what is the impact of socioeconomic status and urban or rural residence?
Even when children with similar behavioural symptoms and demographic characteristics were compared, socioeconomic factors had a significant impact on incidence of methylphenidate use.
The present data suggest that the biosynthesis of catecholamine by the action of TH should be deeply involved in decreased intellectual ability in patients with schizophrenia. This is the first report, as far as we know, showing a correlation between TH expression and IQ in humans.