| Clue | Source | Date |
|---|---|---|
| Chronic pain remedy | New York Times | 14 Mar 2020 |
| Pain relief injection | USA Today | 20 May 2019 |
| Pain-management injection | ||
| Pain relief injection | ||
| Pain-management injection | USA Today | 10 Nov 2018 |
| Remedy for a pain in the neck | ||
| Remedy for a pain in the neck |