Terms and Synonyms Searched:
| Terms | Search Results* | Entire Database** |
|---|---|---|
| Synonyms | ||
| test | 22 studies | 122,137 studies |
| Testing | 10 studies | 24,500 studies |
| tested | 7 studies | 13,679 studies |
| Laboratory procedure | -- | 59 studies |
| breath | 22 studies | 6,607 studies |
| Respiratory air | -- | 2 studies |
| 13c-urea | 22 studies | 26 studies |
| C13 Urea | 6 studies | 7 studies |
| Carbon 13 urea | 1 studies | 1 studies |
| UREA C-13 | -- | 1 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 |