1. Department of Clinical and Experimental Medicine, Psychiatry Unit, University of Catania, Catania, Italy
2. Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, the Netherlands
3. UMC Utrecht Brain Centre, University Medical Centre Utrecht, Utrecht University, Utrecht, the Netherlands
4. Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
5. Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA