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The authors regret that the GROUP-investigators were not acknowledged for their work due to a missing affiliation in the original publication. The new authorship line is: Annemarie P.M. Stiekema a,b Md Atiqul Islam c,d,e Edith J. Liemburg c,d,f Stynke Castelein c,g Edwin R. van den Heuvel h Jaap van Weeghel i,j Andre Aleman f,k Richard Bruggeman c,d Lisette van der Meer a,c GROUP-investigators l a Lentis Psychiatric Institute, Department of Rehabilitation, Zuidlaren, The Netherlands b School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University Medical Centre, Maastricht, The Netherlands c University of Groningen, University Medical Center Groningen, University Center for Psychiatry, Groningen, The Netherlands d University of Groningen, University Medical Center Groningen, Groningen, Rob Giel Research center, The Netherlands e Department of Statistics, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh f University of Groningen, University Medical Center Groningen, Department of Neuroscience, Groningen, The Netherlands g Lentis Psychiatric Institute, Research Department, Groningen, The Netherlands h Department of Mathematics and Computer Science, Eindhoven University of Technology, Eindhoven, The Netherlands i Parnassia Group, Dijk en Duin Mental Health Center, Castricum, The Netherlands j Department of TRANZO, Tilburg School of Social and Behavioral Sciences, Tilburg University, The Netherlands k University of Groningen, Department of Clinical Psychology and Experimental Psychopathology, Groningen, The Netherlands l GROUP investigators are: Behrooz Z. Alizadeh m , Agna A. Bartels-Velthuis n , Nico J. van Beveren o,p,q , Richard Bruggeman n , Wiepke Cahn r , Lieuwe de Haan s , Philippe Delespaul t , Carin J. Meijer s , Inez Myin-Germeys u , Rene S. Kahn r , Frederike Schirmbeck s , Claudia J.P. Simons t,v , Neeltje E.M. van Haren r,w , Jim van Os t,x , Ruud van Winkel u m University of Groningen, University Medical Center Groningen, Department of Epidemiology, Groningen, The Netherlands n University of Groningen, University Medical Center Groningen, University Center for Psychiatry, Rob Giel Research center, Groningen, The Netherlands o Antes Center for Mental Health Care, Rotterdam, The Netherlands p Erasmus MC, Department of Psychiatry, Rotterdam, The Netherlands q Erasmus MC, Department of Neuroscience, Rotterdam, The Netherlands r University Medical Center Utrecht, Department of Psychiatry, Brain Centre Rudolf agnus, Utrecht, The Netherlands s Academic Medical Center, University of Amsterdam, Department of Psychiatry, Amsterdam, The Netherlands t Maastricht University Medical Center, Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht, The Netherlands u KU Leuven, Department of Neuroscience, Research Group Psychiatry, Center for Clinical Psychiatry, Leuven, Belgium v GGzE, Institute for Mental Health Care Eindhoven and De Kempen, Eindhoven, The Netherlands w Department of Child and Adolescent Psychiatry/Psychology, Erasmus Medical Centre, Rotterdam, Netherlands x King's College London, King's Health Partners, Department of Psychosis Studies, Institute of Psychiatry, London, United Kingdom The authors apologise for any inconvenience caused.