1. Department of Medical Psychology, Leiden University Medical Center, Leiden, The Netherlands
2. Walaeus Library, Leiden University Medical Center, Leiden, The Netherlands
3. Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
4. Department of Hygiene and Public Health, School of Medicine, Teikyo University, Tokyo, Japan
5. School of Psychology, Keele University, Newcastle-under-Lyme, UK
6. Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands
7. Department of Medical Oncology, Leiden University Medical Center, Leiden, The Netherlands