| CDT | Cold detection threshold |
| CNBD | Corneal nerve branch density |
| CNFD | Corneal nerve fibre density |
| CNFL | Corneal nerve fibre length |
| HRT3RCM | Heidelberg Retinal Tomograph 3 Rostock cornea module |
| IENFD | Intraepidermal nerve fibre density |
| IVCM | In vivo confocal microscopy |
| NPS | Neuropathic pain score |
| NPV | Negative predictive value |
| OHQ | Orthostatic Hypotension Questionnaire |
| PGP | Protein gene product |
| PPV | Positive predictive value |
| QSART | Quantitative sudomotor axon reflex test |
| QST | Quantitative sensory testing |
| SD | Standard deviation |
| SFN | Small fibre neuropathy |
| TBUT | Tear break-up time |
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