| ah | Fit Additive Hazards Regression Models |
| ah.2ph | Fit Additive Hazards Regression Models to Two-phase Sampling |
| nwtsco | Dataset from the National Wilms Tumor Study (NWTS) |
| predict.ah | Prediction Based on the Fitted Additive Hazards Model |
| predict.ah.2ph | Prediction Based on the Additive Hazards Model Fitted from Two-phase Sampling |