title: [Chronic diseases and perception of school demands among school children aged 11-15 years in Poland].
authors.affiliation: Zakład Ochrony i Promocji Zdrowia Dzieci i Młodziezy. joanna.mazur@imid.med.pl
authors.forename: Joanna
authors.initials: J
authors.lastname: Mazur
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Małkowska-Szkutnik