Vancouver Formating - removeing spaces on mulitple references

Hi Paul,

I am using the Vancouver citation format.

When work is compiled from BS 11 into word with multiple but none sequential references a space is inserted between each reference. e.g (68, 74, 75). The preferred formatting under Vancouver is to have no spaces, i.e (68,74,75).

Is it possible to have this changed please. This would remove the need for trivial and repetitive editing when the work is recompiled after making corrections/amendments.

thank you

Stephen