On Sat, 28 Sep 2002, Rich Greenberg wrote:
> } 'COX-2' or '9-NC'
>
> Also try "COX-2".  Single & double quotes have somewhat different
> meanings.

By which Rich means that a sigle quote, 'COX-2', is case insensitive so
it will hit on cox-2 as well as COX-2, while a double quote, "COX-2"
makes the search case sensitieve so COX must be uppercase to get a hit.

However, if there is such a thing as NCOX-2 "COX-2" will hit on it, so if
you don't want that you need a space: " COX-2".  Or, if there is such a
thing a COX-21 and you don't want that, you need a space: "COX-21 ".
If, in addition to COX-2 there are also NCOX-2 and COX-21 and you want only
COX-2 put a space at either end: " COX-2 ".

Douglas Winship
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