| FLC | free light chains |
| KFLC | kappa free light chains |
| LFLC | lambda free light chains |
| CSF | cerebrospinal fluid |
| Ig | immunoglobulin |
| MS | multiple sclerosis |
| CIS | clinically isolated syndrome |
| NMOSD | neuromyelitis optica spectrum disorders |
| ELISA | enzyme-linked immunosorbent assay |
| EDSS | expanded disability status scale |
| MRI | magnetic resonance imaging |
| EDTA | ethylenediaminetetraacetic acid |
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