1. Institute for Positive Health, 3521 AL Utrecht, The Netherlands
2. Positive Health International, 3572 JC Utrecht, The Netherlands
3. Leidsche Rijn Julius Centre for Primary Care, Utrecht University Medical Centre, 3584 CX Utrecht, The Netherlands
4. Research Centre for Education and the Labour Market (ROA), School of Business and Economics, Maastricht University, 6211 LM Maastricht, The Netherlands
5. Health Care Academy, Saxion University of Applied Sciences, 7513 AB Enschede, The Netherlands
6. Medical School Twente, Medical Spectrum Twente, 7512 KZ Enschede, The Netherlands
7. Afferden Centre for Primary Care, 5851 AS Afferden, The Netherlands