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Unfortunately, the authors fail to elaborate on the method they used. ( )

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In their first study, they forecast an increase in the elderly population of 12.6 million between 2013 and 2023. ( )

We do not claim to We do not claim to provide a complete solution to this problem.( )

Readers are invited to examine the references given with this article to verify the fact that our results our truly representative.( )

I’m just writing to assure you that we are working on the problem.( )