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Summary of Study Types.
| Study type | Number of publications |
|---|---|
| Cohort | 13 |
| Unknown | 11 |
| Expert opinion | 10 |
| Biological modeling/simulation | 6 |
| Case-control | 5 |
| Public health modeling | 5 |
| Cross-sectional | 5 |
| Case series | 4 |
| Case report | 3 |
| Clinical trial | 2 |
| Review | 2 |
| Theoretical | 2 |
