Authors’ contributions
MB conceived the study and has driven the funding acquisition together with KS. MB is in charge of the project. MB and JB developed and specified the study design and the intervention. JB is responsible for the implementation of the intervention and data collection in the general practices. JB prepared the first draft of the manuscript, MB revised the manuscript. All authors read and approved the final manuscript. All authors fulfil the authorship criteria of the International Committee of Medical Journal Editors.