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| AHeVT | AHe V(t)-approach |
| AHeVXT | AHe V(X(t),t)-approach |
| CD4 | The CD4 dataset |
| QRIndiv | Individual quantile objective function |
| QRSimul | Unweighted simultaneous objective function |
| QRStepwise | Stepwise procedure |
| QRWSimul | Weighted simultaneous objective function |
| test_variability | Variability Estimation and Testing |