Terms and Synonyms Searched:
| Terms | Search Results* | Entire Database** |
|---|---|---|
| Synonyms | ||
| melatonin | 10 studies | 714 studies |
| N-Acetyl-5-methoxytryptamine | 1 studies | 20 studies |
| Circadin | 1 studies | 37 studies |
| 5-methoxy-N-acetyltryptamine | -- | 2 studies |
| Melatonina | -- | 3 studies |
| covid-19 | 10 studies | 8,149 studies |
| Coronavirus disease 2019 | 1 studies | 374 studies |
| SARS Coronavirus 2 Infection | 1 studies | 5 studies |
| 2019 nCoV Disease | -- | 6 studies |
| 2019 nCoV Infection | -- | 10 studies |
| 2019 Novel Coronavirus Disease | -- | 19 studies |
| 2019 Novel Coronavirus Infection | -- | 15 studies |
| coronavirus 2019-nCoV | -- | 1 studies |
| Coronavirus Disease 19 | -- | 53 studies |
| Disease caused by 2019-nCoV | -- | 1 studies |
| Disease caused by SARS-CoV-2 | -- | 4 studies |
| SARS-CoV-2 Disease | -- | 13 studies |
| SARS-CoV-2 infection | -- | 685 studies |
| Severe Acute Respiratory Syndrome Coronavirus 2 Infection | -- | 8 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 |