A Non-interventional Study Evaluating the Clinical Benefit and Effectiveness of Quetiapine Fumarate Extended

Inclusion Criteria: * Diagnosed as Schizophrenia according to DSM-IV-TR criteria * Patients who are taking Seroquel XR no longer than 1 month * Patients who get antipsychotics monotherapy at least 1 week before enroll in this study Exclusion Criteria: * First episode, drug naive schizophrenic subjects. * Meeting the criteria for any other (than schizophrenia) DSM-IV Axis I diagnosis,concomitant organic mental disorder or mental retardation that in the opinion of the Principal Investigator may interfere with study conduct or interpretation. * Known lack of response to clozapine or treatment with clozapine within 4 weeks prior to enrollment.