We found 576 records through electronic searching of the
Cochrane Schizophrenia Register; 262 of these were duplicates
leaving 173 records for screening (Figure 1). After screening, 53
full text articles were obtained for further assessment but only 7
were potentially relevant, these were closely assessed for inclusion
but none of these could eventually be included in the review. Seven
studies therefore are in the Excluded studies section of the review.