| HCL | hairy-cell leukemia; human cultured lymphoblasts |
|---|---|
| HLF | heat-labile factor; hepatic leukemia factor |
| HLV | hamster leukemia virus; herpes-like virus; hypoplastic left ventricle |
| HTLF | human T-cell leukemia virus enhancer factor |
| HTLV | human T-cell leukemia/lymphoma virus; human T-lymphotropic virus |