Searches of
| | | | | | | | |
Databases of peer-reviewed literature
|
No
|
No
|
No
|
No
|
Yes
|
Yes
|
NA
|
NA
|
Databases of grey literature
|
Yes
|
Yes
|
No
|
No
|
Yes
|
Yes
|
NA
|
NA
|
Databases of media reporting
|
No
|
Yes
|
No
|
No
|
Yes
|
Yes
|
NA
|
NA
|
Relevant peer-reviewed journals
|
No
|
No
|
No
|
No
|
Yes
|
Yes
|
NA
|
NA
|
Internet search engines
|
No
|
Yes
|
No
|
No
|
Possibly
|
Yes
|
NA
|
NA
|
Reference and citations of included studies
|
No
|
No
|
No
|
No
|
Yes
|
Yes
|
NA
|
NA
|
Other publications of authors of included studies
|
No
|
No
|
No
|
No
|
Yes
|
Yes
|
NA
|
NA
|
Relevant funder and third sector websites
|
No
|
Yes
|
No
|
No
|
Possibly
|
Possibly
|
NA
|
NA
|
General requests for information sent to email lists, online boads, published in ‘professional press’ and distributed via Twitter
|
No
|
Yes
|
No
|
Yes
|
Possibly
|
Yes
|
Yes
|
Yes
|
Targeted requests sent via email to named contacts
|
No
|
Yes
|
No
|
Yes
|
Possibly
|
Yes
|
Yes
|
Possibly
|