Additional files to the SR8 final report

Additional file 1.  Search string development

Additional file 2.  Web-based searching record

Additional file 3.  Unobtainable articles

Additional file 4.  List of articles excluded at full text along with reasons

Additional file 5.  Coding and meta-data extraction schema

Additional file 6.  Primary research studies systematic map database

Additional file 7.  Review articles database

Additional file 8.  Articles excluded at full text due to language

Additional file 9.  Term use in primary studies by study location