1. Department of Psychiatry, Collaborative Antwerp Psychiatric Research Institute (CAPRI), Faculty of Medicine and Health Sciences, University of Antwerp, Campus Drie Eiken, Wilrijk, Belgium
2. Department of Psychiatry, Radboud University Medical Centre, HB Nijmegen, The Netherlands
3. Department of Internal Medicine, University Hospital of Antwerp, Edegem, Belgium
4. University of Antwerp, Campus Drie Eiken, Wilrijk, Belgium