| Study | Reason for exclusion |
|---|---|
| Azorín 2017 | Controlled clinical trial, participants had toxic multinodular goitres |
| Lee 2015 | Review of meta‐analysis |
| Mojsak 2016 | Short follow‐up of eight weeks |
| Nieuwlaat 2003 | Uncontrolled clinical trial |
| Silva 2004 | Most participants had toxic multinodular goitres |
| Tang 2016 | Review of meta‐analysis |
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.