Additional file 1: of Assessment of perceptions, knowledge, and attitudes of parents regarding children’s schoolbags and related musculoskeletal health AlsiddikyAbdulmonem AlatassiRaheef AlsaadouniFayez BakermanKhalid AwwadWaleed AlenaziAbdulrahman AlsiddiqiSara AlyaseenHusain 2019 A questionnaire that used to collect data on parents’ awareness of the use of schoolbags by their children. The questionnaire contained 19 questions divided into four parts. (DOCX 14 kb)