| HTLV | Human T-lymphotropic virus |
| SZBC | Shenzhen Blood Center |
| ELISA | Enzyme-linked immunosorbent assay |
| NCCL | National Center for Clinical Laboratories |
| PPV | Positive predictive value |
| OR | Odds ratio |
| CI | Confidence interval |
| RR | Rate ratio |
| PVL | Proviral load |
| S/CO | Signal-to-cutoff |
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