Heinrichs D W, Carpenter W T
Am J Psychiatry. 1985 Mar;142(3):371-3. doi: 10.1176/ajp.142.3.371.
The authors examined the type and frequency of prodromal symptoms in 47 cases of schizophrenic relapse during which 30 patients were drug free and 17 were medicated. The findings indicate that clinicians who use patient and family reports can identify prodromal symptoms as they occur.