PRISMA 2020 flow diagram for new systematic reviews which included searches of
databases and registers only
*Consider, if feasible to do so, reporting the number of records identified from each database or register searched (rather than the
total number across all databases/registers).
**If automation tools were used, indicate how many records were excluded by a human and how many were excluded by
automation tools.
Source: Page MJ, et al. BMJ 2021;372:n71. doi: 10.1136/bmj.n71.
This work is licensed under CC BY 4.0. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
Records identified from*:
Databases (n = )
Registers (n = )
Records removed before
screening:
Duplicate records removed
(n = )
Records marked as ineligible
by automation tools (n = )
Records removed for other
reasons (n = )
Records screened
(n = )
Records excluded**
(n = )
Reports sought for retrieval
(n = )
Reports not retrieved
(n = )
Reports assessed for eligibility
(n = ) Reports excluded:
Reason 1 (n = )
Reason 2 (n = )
Reason 3 (n = )
etc.
Studies included in review
(n = )
Reports of included studies
(n = )
Identification of studies via databases and registers
Identification
Screening
Included