Table 2.

The results of literature searching and duplicate removal, indicating the number of articles from each source that were included after the full-text screening stage

Source	Date Searched	Total results	Duplicates removed	Relevant full-texts	Relevance rate (%)
SCOPUS	15.9.20	10,646	40	881	8.3
Web of Science Core Collection	15.9.20	8953	6544	137	5.7
ProQuest Natural Science (Published)	15.9.20	9078	8690	11	2.8
ProQuest Natural Science (Grey Literature)	15.9.20	395	40	26	11.3
Google Scholar	15.9.20	500	72	13	3.0
Organisational Websites	19.4.21–27.4.21	1238	0	23	1.9

Relevance is the percentage of de-duplicated results that were included after full-text screening. An additional 22 articles were excluded during the coding stage