Terms and Synonyms Searched:
| Terms | Search Results* | Entire Database** |
|---|---|---|
| Synonyms | ||
| 12 hours | 20 studies | 5,847 studies |
| hours | 34 studies | 70,110 studies |
| hrs | -- | 2,636 studies |
| -- | No studies found |
| * | Number of studies in the search results containing the term or synonym |
| ** | Number of studies in the entire database containing the term or synonym |