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.
A CONSORT flow diagram of the study identification, screening and selection process. 1 Excluded studies either investigated participants who are not clinically-stable (n = 12) or does not mention the status of participants (n = 77). MeSH, Medical Subject Headings; SH, Subject heading; Ti/ab, title and abstracts.
