Derryn Knife

Check out [SurPyval](https://surpyval.readthedocs.io/en/latest/SurPyval%20Models.html#parametric-surpyval-modelling). It has the capability to take arbitrary censoring (and truncation) with the one API. ``` python import surpyval as surv x = [10, [11, 20], [21, 25],...