Table 1.

Characteristics of included studies (N=101).

Characteristics		Number of studies, n	Reference(s)
Year of publication
	Before 2000	1	[21]
	2000-2004	2	[22]
	2005-2009	25	[3,23-45]
	2010-2014	18	[46-63]
	2015-2018	47	[64-111]
	2019	8	[112-117]
Type of publication
	Journal article	60	[21-23,25,28,32,34-36,39-43,45,46,49,53,56,59-65,67,69-71,73,74,76,78,80-83,85,86,88-90,93,95-97,99-101,104,106,108,109,114-119]
	Conference proceeding	37	[3,24,26,27,29-31,33,37,38,44,47,48,50,54,55,57,58,68,72,75,77,79,84,87,92,94,98,102,103,105,107,110,111,113,120]
	Thesis dissertation	3	[51,66,91]
	Reviews	1	[112]
Theme of study
	Prototype design	50	[3,21,22,24-26,31-34,36-40,42-44,47,50,57-60,67-71,77-80,86-90,99-105,114,118,120]
	Validation	29	[27-29,41,45,46,48,52,53,61-63,72-74,81,92,93,106-111,115-117,119]
	Observational	21	[23,30,35,49,54-56,64,65,75,76,82-85,94,96-98]
	Review	1	[112]