Types of studies
| Study type | Number of studies | Percent |
|---|---|---|
| Randomized controlled trial | 1 | 0.5 |
| Prospective series (10+ pts) | 7 | 3.4 |
| Retrospective series (10+ pts) | 91 | 44.2 |
| Case report | 35 | 17.0 |
| Case series (2–9 pts) | 23 | 11.2 |
| Animalstudy | 9 | 4.4 |
| Non-humanor imaging study | 21 | 10.2 |
| Systematic reviewor meta-analysis | 7 | 3.4 |
| National or state database analysis or literature review | 12 | 5.8 |