Additional files to the SR4 final report

Additional file 1:  Search string development

Additional file 2:  Academic database search results

Additional file 3:  Internet search engine search results

Additional file 4:  Specialist websites search results

Additional file 5:  Database of reviews and meta-analyses

Additional file 6:  Articles unobtainable as full texts

Additional file 7:  Systematic map database

Additional file 8:  Articles excluded at full text

Additional file 9:  Long-Term Experimental (LTE) sites database