Estimating Mean of a Poisson Distribution Based on Interval censoring

#1
Dear all,

I appreciate that if you let me know if there is any package implemented in R for Estimating Mean of a Poisson Distribution Based on Interval censoring? And if yes, could you please provide some information about it:)

By the way, is there anything for lognormal?I think fitdistcens is not good for this purpose as it gives me different result compared to SAS and only useful for right/left censoring and not interval censoring (or both left and right together).

Kind regards,
Mohsen