Symptoms of disordered eating and participation in individual- and team sports: A population-based study of adolescents Ove Heradstveit, Mari Hysing, Sondre Aasen Nilsen, Tormod Bøe December 2020 PDF Cite DOI "Disordered eating" "Eating disturbance" "EDS-5" "Population-based study" "Sports participation"