Active travel behaviour in the family environment: protocol for the mixed-methods cross-sectional ARRIVE study - Reimers, Anne Kerstin; Marzi, Isabel; Beck, Franziska; Engels, Eliane; Renninger, Denise; Buttazzoni, Adrian; Krieger, Claus; Demetriou, Yolanda (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2022)