When you run Leber hereditary[tiab] and look in the details you will see
that PubMed is assuming it is a phrase, therefore really what it is running
is "Leber hereditary"[tiab] and only producing results where those words
appear right next to each other and in that order.

Leber[tiab] AND hereditary[tiab] brings out results where "Leber"
and "hereditary" appear at least once, independent of each other.

Susan Fowler, MLIS
Medical Librarian

Evidence at Becker:

Systematic Reviews Guide:

Becker Medical Library, Washington University in St. Louis
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On Mon, Jun 10, 2013 at 9:53 AM, Vonville, Helena M <
[log in to unmask]> wrote:

> I'm stumped as to why this is happening.
> I'm running a very long search for a project  and I keep encountering a
> problem whereby diseases with the name of a person won't be found when
> searching [tiab] in PM.
> Here's an example:
> Leber hereditary[tiab]      vs
> Leber[tiab] AND hereditary[tiab]
> If you do the search, you'll see multiple records that refer to leber
> hereditary-but only if you do the second search.  The first search returns
> no items found.
> This has happened on several disease names.  Any ideas why?
> Helena
> Helena M. VonVille, MLS, MPH
> Library Director
> University of Texas School of Public Health Library Houston, TX  77030
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