is interval censored survival data? is interval censored data valid? why is interval censored what is interval censored data is interval censored data valid when is interval censored data what is interval censored is interval censored survival data how to censor survival data when is interval censored is interval censored data accurate is interval censored what is interval censored what is interval censored why is interval censored? why is interval censored is interval censored survival interval censored data definition is interval censored survival data accurate interval censored definition is it better interval censored or uncensored