| Study | Reason for exclusion |
|---|---|
| Coquoz 1991 | Participants were healthy volunteers |
| Raja 2002 | Participants randomised to drug class, not individual drug, and results for individual drugs not reported separately |
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.