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Search strategy
| MEDLINE | Embase | Cochrane |
|---|---|---|
| 1. cancer.mp or exp Neoplasms | 1. cancer.mp or exp Neoplasm | 1. “cancer” in title, abstract, OR as keyword |
| 2. Retracted Publication/ | 2. Retracted article/ | 2. “oncology” in title, abstract, OR as keyword |
| 3. 1 AND 2 | 3. Retraction/ | 3. retract* anywhere in text |
| 4. 2 OR 3 | 4. 1 OR 2 | |
| 5. 1 AND 4 | 5. 3 AND 4 |
