Early substance use cessation improves cognition-10 years outcome in first-episode psychosis patients

Melissa A. Weibell^*, Jan Olav Johannessen, Bjørn Auestad, Jørgen Bramness, Kolbjørn Brønnick, Ulrik Haahr, Inge Joa, Tor Ketil Larsen, Ingrid Melle, Stein Opjordsmoen, Bjørn Rishovd Rund, Jan Ivar Røssberg, Erik Simonsen, Per Vaglum, Helen Stain, Svein Friis, Wenche Ten Velden Hegelstad