Supplemental Material6 - Supplemental material for The prevalence of headache in German pupils of different ages and school types

Supplemental material, Supplemental Material6 for The prevalence of headache in German pupils of different ages and school types by Vera Nieswand, Matthias Richter, Reinhard Berner, Maja von der Hagen, Anna Klimova, Ingo Roeder, Thea Koch, Rainer Sabatowski and Gudrun Gossrau in Cephalalgia