title: Retraction: Vitamin C and asthma in children: modification of the effect by age, exposure to dampness and the severity of asthma.
authors.affiliation: Department of Public Health, University of Helsinki, Helsinki, Finland. harri.hemila@helsinki.fi.
authors.forename: Harri
authors.initials: H
authors.lastname: Hemilä
authors.forename: Mohammed
authors.initials: M
authors.lastname: Al-Biltagi
authors.forename: Ahmed Abdul
authors.initials: AA
authors.lastname: Baset