Sleepwake cycles and cognitive functioning in schizophrenia Vivien Bromundt, Matthias Köster, Angela Georgiev-Kill, Klaus Opwis, Anna Wirz-Justice, Gabriela Stoppe and Christian Cajochen The British Journal of Psychiatry published online Jan 24, 2011; Access the most recent version at doi:10.1192/bjp.bp.110.078022
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