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Search strategy used in PubMed database.
| Number | Search terms |
| 1 | Traditional Chinese Medicine(MeSH) |
| 2 | (Zhong yi xue OR Chinese herbal medicine) |
| 3 | (Single medicine OR Compound prescription):ti.ab |
| 4 | 1 OR 2 OR 3 |
| 5 | Helicobacter pylori MeSH) |
| 6 | (Hp OR Helicobacter pylori infection OR Eradication of Helicobacter pylori):ti.ab |
| 7 | 5 OR 6 |
| 8 | (Randomized controlled trial): pt |
| 9 | (Randomized OR placebo):ti.ab |
| 10 | 8 OR 9 |
| 11 | 4 and 7 and 10 |
