Di Matteo and Grootendorst ( 2002 ) also observed a slightly significant increase in drug expenditure in the population between 64 and 74, although the result was not confirmed by the more recent study by Di Matteo ( 2005 ).
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Di Matteo and Grootendorst ( 2002 ) also observed a slightly significant increase in drug expenditure in the population between 64 and 74, although the result was not confirmed by the more recent study by Di Matteo ( 2005 ).