An R package to implement the two-step update estimation approach given by Zhou and Wong (2026, Biometrika).
An R package to implement the sieve maximum likelihood methods for analyzing interval-censored failure time data from the outcome-dependent sampling (ODS) design given by Zhou, Cai and Zhou (2018, Biometrics) and from the case-cohort design given by Zhou, Zhou and Cai (2017, Biometrika).