Treating impulsivity with probiotics in adults (PROBIA) : study protocol of a multicenter, double-blind, randomized, placebo-controlled trial - Arteaga-Henríquez, Gara (Hospital Universitari Vall d'Hebron. Institut de Recerca) ; Rosales, Silvia Karina (Hospital Universitari Vall d'Hebron. Institut de Recerca) ; Arias-Vásquez, Alejandro (Radboud University Medical Centre. Department of Psychiatry) ; Bitter, Istvan (Semmelweis University. Department of Psychiatry and Psychotherapy) ; Ginsberg, Ylva (Karolinska Institutet (Estocolm, Suècia). Department of Clinical Neuroscience) ; Ibáñez, Pol (Hospital Universitari Vall d'Hebron. Institut de Recerca) ; Kilencz, Tünde (Semmelweis University. Department of Psychiatry and Psychotherapy) ; Lavebratt, Catharina (Karolinska University Hospital and Karolinska Institutet (Suècia)) ; Matura, Silke (Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital, Goethe University, Frankfurt, Germany) ; Reif, Andreas (Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital, Goethe University, Frankfurt, Germany) ; Rethelyi, Janos (Semmelweis University. Department of Psychiatry and Psychotherapy) ; Richarte, Vanesa (Hospital Universitari Vall d'Hebron) ; Rommelse, Nanda (Karakter Child and Adolescent Psychiatry University Centre) ; Siegl, Anne (Department of Psychiatry, Psychosomatic Medicine and Psychotherapy, University Hospital, Goethe University, Frankfurt, Germany) ; Ramos-Quiroga, Josep Antoni (Universitat Autònoma de Barcelona. Departament de Psiquiatria i de Medicina Legal)