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The top 5 countries/regions related to acupuncture treatment on headache.
| Rank | Country/regions | Counts | Centrality | Proportion (%) |
|---|---|---|---|---|
| 1 | China | 309 | 0.26 | 38.2 |
| 2 | United States | 224 | 0.33 | 27.7 |
| 3 | Germany | 101 | 0.22 | 12.5 |
| 4 | England | 64 | 0.22 | 7.9 |
| 5 | Italy | 47 | 0 | 5.8 |
