Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Study screening process: PRISMA flow diagram.
Note: Reproduced from Moher D, Liberati A, Tetzlaff J, Altman DG, PRISMA Group. Preferred reporting items for systematic Reviews and meta-analyses: the PRISMA statement. BMJ. 2009;339:b2535.37
Abbreviation: EHR, electronic health record.
