1. Department of Special Education, Stockholm University, Stockholm, Sweden
2. Institute of Systemic Behavior Analysis, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Behavioral Science, Oslo Metropolitan University, Oslo, Norway
4. Istituto Europeo per Lo Studio Del Comportamento Umano – IESCUM, Università IULM, Milano, Italy
5. Faculty of Psychology, University of Iceland, Reykjavik, Iceland
6. Centre for Behaviour Analysis, Queen’s University Belfast, N. Ireland
7. School of Psychology, Ulster University, Coleraine, N. Ireland
8. Department of Behavior Analysis, University of North Texas, Denton, TX, USA