| HBV | Hepatitis B Virus |
| ERCP | Endoscopic Retrograde Cholangiopancreatography |
| CT | Computed Tomography |
| CMV | Cytomegalovirus |
| EBV | Epstein–Barr Virus |
| PTLD | Post-Transplant Lymphoproliferative Disorders |
| GVHD | Graft-Versus-Host Disease |
| PET-CT | Positron Emission-Computed Tomography |
| 18F-FDG | 18F-Fluorodeoxyglucose |