Understanding the impact of persistent symptoms in schizophrenia: Cross-sectional findings from the Pattern study - Haro, Josep Maria; Altamura, Carlo; Corral, Ricardo; Elkis, Helio; Evans, Jonathan; Malla, Ashok; Krebs, Marie-Odile; Zink, Mathias; Bernasconi, Corrado; Lalonde, Justine; Nordstroem, Anna-Lena (Schizophrenia Research, 2015)