| CBC | complete blood count |
| CI | confidence interval |
| CMV | cytomegalovirus |
| CRP | C-reactive protein |
| EBV | Epstein–Barr virus |
| ESR | erythrocyte sedimentation rate |
| HIV | human immunodeficiency virus |
| LDH | lactate dehydrogenase |
| OR | odds ratio |
| TORCH | toxoplasmosis, other agents, rubella, cytomegalovirus, and herpes simplex |