1. Department of Psychiatry Radboud University Medical Centre Nijmegen The Netherlands
2. Radboudumc Centre for Mindfulness, Department of Psychiatry Radboud University Medical Centre Nijmegen The Netherlands
3. Expertise Center for Depression Pro Persona Nijmegen The Netherlands
4. Behavioural Science Institute Radboud University Nijmegen The Netherlands
5. Institute of Psychology Leiden University Leiden The Netherlands
6. Department of Psychiatry Leiden University Medical Center Leiden The Netherlands