1. eHealth group, Roessingh Research and Development, Enschede, Netherlands
2. National Foundation for the Elderly, Amersfoort, Netherlands
3. NOTHING AG, Köniz, Switzerland
4. Department of Human Media Interaction, University of Twente, Enschede, Netherlands
5. Department for Clinical Psychology and Psychotherapy, University of Bern, Bern, Switzerland
6. School of Social Work, University of Applied Sciences and Arts Northwestern Switzerland, Olten, Switzerland
7. Iscte-Instituto Universitário de Lisboa, CIS-Iscte, Lisboa, Portugal
8. Psychiatric Department at The Health Unit of Baixo Alentejo, Beja, Portugal