1	exp "Information Storage and Retrieval"/
2	*Information Services/
3	Medical Subject Headings/
4	*Information Systems/
5	Databases, Bibliographic/ or Databases as Topic/ or PubMed/ or Medline/
6	Search Engine/
7	Public Health Informatics/
8	Librarians/ or Libraries, Medical/ or Library Services/
9	(medline or embase or pubmed or cinahl or "Cumulative Index to Nursing and Allied Health Literature" or psycinfo or assia or "applied social sciences index and abstracts" or BNI or british nursing index or google scholar or scopus or cochrane library or ovid or ebsco or wiley).ti.
10	((database* or source*) adj3 (select* or choos* or choice* or compar* or valu*)).tw.
11	(search* adj3 (strateg* or method* or technique* or question* or approach* or precision or effectiv* or efficien* or recall* or literature or citation* or electronic* or hand* or online* or multifacet* or multi facet* or database* or iterative* or evidence or supplementary)).ti.
12	((grey or gray) adj3 literature*).ti.
13	(information adj1 (specialist* or scientist* or professional* or retrieval*)).ti.
14	librarian*.ti.
15	(berrypick* or berry‐pick* or pearl grow* or snowball*).tw.
16	(reference adj2 (harvest* or check*)).tw.
17	((Literature or data) adj2 source*).ti.
18	or/1‐17
19	"Review Literature as Topic"/
20	Practice Guidelines as Topic/
21	exp evidence‐based practice/
22	government publications as topic/ or consensus development conferences as topic/
23	Meta‐Analysis as Topic/
24	Technology Assessment, Biomedical/ or Comparative Effectiveness Research/
25	(systematic reviews or qualitative studies or rcts or randomised controlled trials or observational studies or health technology assessments or guidelines or comparative effectiveness or meta analyses or metaanalyses or metanalyses).ti.
26	(evidence adj3 synthes*).tw.
27	("evidence based" adj1 (practice or medicine or health or nursing)).ti.
28	or/19‐27
29	18 and 28
30	limit 29 to english language
31	limit 30 to yr="2015 ‐Current"