Author Contributions
M.M., R.H., N.A., R.T., K.L. and L.K. conceived the study, initiated the study design and obtained funding; B.P., M.R. and K.G. were responsible for data curation, B.P. and M.M. for the data analysis. M.M., N.A., K.L., L.K., M.R., E.G.d.M. and B.P. developed the methodology for the intervention app and all study materials. B.P. and M.M. drafted the original manuscript. All authors have read and agreed to the published version of the manuscript.