1 Institute of General Practice, Johann Wolfgang Goethe University, D-60590 Frankfurt, Germany [email protected].
2 Department of Family Medicine, School CAPHRI, Maastricht University, Maastricht, Netherlands Academic Center for General Practice/Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium.
3 Centre for Research in Evidence-Based Practice (CREBP), Bond University, Gold Coast, Robina, QLD 4226, Australia.