1Diabetes Centre, Department of Internal Medicine, VU University Medical Centre, Amsterdam, the Netherlands
2Department of Medical Psychology, VU University Medical Centre, Amsterdam, the Netherlands
3Department of Radiology, VU University Medical Centre, Amsterdam, The Netherlands
4Department of Anatomy and Neuroscience, VU University Medical Centre, Amsterdam, the Netherlands
5Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, USA
6Department of Ophthalmology, VU University Medical Centre, Amsterdam, the Netherlands
7Department of Physics and Medical Technology, VU University Medical Centre, Amsterdam, the Netherlands