Additional file 1.
Main characteristics of the included studies. Tabulation, for all eligible studies [5,6,13,20-29,32,33,50,51,53-69], of numbers and characteristics of patients or families included, whether problems were likely to be in the clinical range, inter-group comparisons made, nature of the control group, length of follow-up and nature of informants.
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Wilson et al. BMC Medicine 2012 10:130 doi:10.1186/1741-7015-10-130