1. Department of Psychiatry; PC Sint-Amandus; Beernem Belgium
2. Department of Ophthalmology; Kantonsspital Aarau; Aarau Switzerland
3. Laboratory of Neurochemistry and Behavior. Institute Born-Bunge, Department of Biomedical Sciences, University of Antwerp; Antwerp Belgium
4. Department of Neurology and Memory Clinic; Middelheim General Hospital (ZNA); Antwerp Belgium
5. Department of Neurology and Alzheimer Research Center; University of Groningen and University Medical Center Groningen; Groningen The Netherlands