| ME/CFS | Myalgic Encephalomyelitys/Chronic Fatigue Syndrome |
| EUROMENE | European Network on ME/CFS |
| COI | Cost of illness |
| EuroQol-5D | An instrument for measuring quality of life |
| Bn | Billion |
| CCC | Canadian Consensus Criteria |
| PPP | Purchasing Power Parity |
| ICD-10 CM | The international diagnostic classification standard for reporting diseases, disorders, injuries and health conditions for all clinical and research purposes |
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