@article{Nieswand2019, author = "Vera Nieswand and Matthias Richter and Reinhard Berner and Maja von der Hagen and Anna Klimova and Ingo Roeder and Thea Koch and Rainer Sabatowski and Gudrun Gossrau", title = "{Supplemental Material4 - Supplemental material for The prevalence of headache in German pupils of different ages and school types}", year = "2019", month = "3", url = "https://sage.figshare.com/articles/journal_contribution/Supplemental_Material4_-_Supplemental_material_for_The_prevalence_of_headache_in_German_pupils_of_different_ages_and_school_types/7868228", doi = "10.25384/SAGE.7868228.v1" }