1. Department of Medical and Clinical Psychology, Tilburg University, Tilburg, the Netherlands;
2. Unit of Medical Psychology, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden;
3. Department of Obstetrics and Gynaecology, Gelre Hospitals, Apeldoorn location, the Netherlands;
4. Department of Methodology and Statistics, Tilburg University, Tilburg, the Netherlands