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.
Inclusion and exclusion criteria
| Inclusion criteria | Exclusion criteria |
|---|---|
| Randomised control trials (RCT) | Case reports |
| Case–control studies | Cadaver or model studies |
| Case series using navigation | Abstracts/presentations/posters |
| English language/German language | All other languages |
