| ACR | American College of Rheumatology |
| CI | Confidence interval |
| FIQR | Fibromyalgia Impact Questionnaire Revised |
| FM | Fibromyalgia syndrome |
| IRB | Institutional Review Board |
| LAC | L-Acetyl Carnitine |
| PEA | Palmitoylethanolamide |
| PSM | Propensity score matching |
| SFN | Small fiber neuropathy |
| SOC | Standard of Care |
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