1. Department of Clinical Health Psychology, University of Tilburg, The Netherlands.
2. Endocrinology Institute of Kaunas University of Medicine, Lithuania.
3. Department of Psychiatry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
4. Department of Clinical Chemistry, Technical University Eindhoven, The Netherlands.
5. Department of Obstetrics & Gynaecology, Academic Medical Centre Maastricht, The Netherlands.