| DTU | Discrete Typing Unit |
| qPCR | quantitative Polymerase Chain Reaction |
| ECG | Electrocardiograms |
| ELISA | Enzyme Linked Immunosorbent Assay |
| IFA | Indirect Immunofluorescence Assay |
| HR | Hazard ratios |
| IQR | Interquartile range |
| IC | Confidence intervals |
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