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Number of papers obtained for the identified substances and their representative keywords in Pubmed and Web of Science
| Substance groups | Pubmed | Web of Science | Merged and after duplicate check |
|---|---|---|---|
| Stilbenes | 27 | 102 | 101 |
| Thyrostats | 19 | 62 | 61 |
| Steroids | 419 | 560 | 764 |
| Resorcylic acid lactones including zeranol | 9 | 10 | 13 |
| β‐agonists | 77 | 248 | 192 |
| Nitroimidazoles | 122 | 112 | 178 |
