Funding
Landeszentrum Gesundheit Nordrhein-Westfalen, TG
Open Access funding enabled and organized by Projekt DEAL. This work was supported by the Landeszentrum Gesundheit Nordrhein-Westfalen (LZG.NRW), Bochum, Germany, project number LZG TG 75 004/2016.The funding institution is not involved in the study design, data collection, data management, data analyses and interpretation, report writing, decision to submit this report for publication or the writing of this publication.Open Access funding enabled and organized by Projekt DEAL.