Table 1 Literature search strategies

1) Search instrument by name

Full instrument name entered into each search engine.

2) Search instrument by acronym

Acronym(s) entered into each search engine.

3) Search by source article identification

Source article name/reference entered into each search engine.

4) Search by source article “cited by” feature

Source article entered into Google Scholar and “cited by” feature was used.

5) Search for grey literature

Instrument searched in Google to identify grey literature.