NLM has a listing of the libraries:
and more information here:

On Sat, Nov 3, 2012 at 10:03 AM, Kraft, Michelle <[log in to unmask]> wrote:

> John I would guess NLM could tell you how many libraries have signed up
> for LinkOut. But that doesn't meant it is getting used. For that
> information to would need usage stats from a variet of libraries. I know at
> our library LinkOut is a lot based on our usage stats.
> Michelle
> -----Original Message-----
> From: Medical Libraries Discussion List on behalf of Jon Brassey
> Sent: Sat 11/3/2012 3:41 AM
> To: [log in to unmask]
> Subject: Is PubMed LinkOut popular?
> Hi,
> I'm wondering if there are any figures as to how popular PubMed LinkOut is?
> I'm trying to get proportion figures e.g. is it used in 1%, 10%, 25% etc
> medical libraries in the USA?
> Best wishes
> jon
> --
> Jon Brassey
> TRIP Database
> Find evidence fast
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Jacqueline Leskovec, MLIS, MA, RN
Outreach, Planning and Evaluation Coordinator
National Network of Libraries of Medicine
Greater Midwest Region
1750 W. Polk St. M/C 763
Chicago, IL 60612-4330

312.996-2464 Phone
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