R help - Feb 2016 - Estimating Mean of a Poisson Distribution Based on Interval censoring

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
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