1. De Viersprong, Viersprong Institute for Studies on Personality Disorders, Halsteren, the Netherlands (Smits, Luyten, Feenstra, Bales); Faculty of Psychology and Educational Sciences, University of Leuven, Leuven, Belgium, and Research Department of Clinical, Educational and Health Psychology, University College London, London (Luyten); Department of Psychology, University of Amsterdam, Amsterdam (Kamphuis); Department of Research, Arkin Mental Health Care, and Department of Clinical Psychology, Vrije...