merging terms in journal styles

Dear all,

For some reason I’ve got multiple entries for each journals in journal terms list, for instance:

The Journal of Physical Chemistry

Journal of Physical Chemistry

J. Phys. Chem.

and so on…

and I would like to ask if there was a way to save only the correct term in the list (with the abbreviation) and update the journal names in my current library (clearly without re-entering them manually). I use Endnote X7.

Many Thanks

Marco