TABLE 1.

Characteristics of 35 included studies

Characteristic	N	%
Year of publication
≤2011	6	17
2012–2016	12	34
≥2017	17	49
Publication type
Peer reviewed	33	94
Grey literature	2	6
Study location
North America	12	34
Europe/UK	7	20
Australia	6	17
Asia	7	20
Middle East	1	3
Africa	2	6
Study sample size
≤15	16	46
16–30	14	40
≥31	5	14
Language
English	35	100
Interviews	22	63
Focus groups	3	8
Survey with open‐ended questions	2	6
Mixed	8	23
Quality rating (CASP)
Low	4	11
Medium	14	40
High	17	49

Abbreviation: CASP, Critical Appraisal Skills Program assessment. ⁵²