1. Protestant Theological University, Amsterdam, The Netherlands
2. Driestar Christian University, Gouda, The Netherlands
3. Theological University Apeldoorn, Apeldoorn, The Netherlands
4. Section of Educational Sciences, VU University, Amsterdam, The Netherlands
5. Faculty of Theology, VU University, Amsterdam, The Netherlands
6. Faculty of Theology, Stellenbosch University, Stellenbosch, South Africa