Table 2.

Literature search: databases and details of numbers of records retrieved

Date/time	Database	# Records retrieved (including duplicates)	# Records retrieved (excluding duplicates)
07 January 2020 00:05	Ovid MEDLINE(R) and In-Process & Other Non-Indexed Citations and Daily 1946 to January 06, 2020	96	84
07 January 2020 00:09	Ovid MEDLINE(R) Epub Ahead of Print January 06, 2020	1	1
07 January 2020 00:12	EBM Reviews—Cochrane Database of Systematic Reviews 2005 to December 27, 2019, ACP Journal Club 1991 to November 2019, Cochrane Clinical Answers November 2019, Database of Abstracts of Reviews of Effects 1st Quarter 2016	192	99
07 January 2020 00:41	Embase 1974 to 2020 January 03	114	57
07 January 2020 01:35	PsycINFO	52	0
07 January 2020 02:21	CINHAL	51	1
	Total	506	242