| WHO ICTRP* | Date searched 10/11/20 | 10/9/21 |
| SPINAL CORD STIMULATION AND PAIN | 202 | 31 |
| DORSAL ROOT AND PAIN | 50 | 8 |
| SENZA AND PAIN | 16 | 0 |
| EPIDURAL STIMULATION AND PAIN | 1 | 2 |
| NEUROMOD* AND PAIN | 80 | 7 |
| TOTAL | 350 | 48 |
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