411 REFERENCE · Wikibooks
Exercise as it relates to Disease/Interventions to improve cardiovascular health in primary school children
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
This is the critique of the journal article: Harrell, J. S. et al., 1999. A Public Health vs a Risk-Based Intervention to Improve Cardiovascular Health in Elementary School Children: The Cardiovascular Health in Children Study. American Journal of Public Health, 89(10), pp. 1529-1535.