Clinical Queries Are Effective

The use of the clinical queries filters is strongly recommended by proponents of evidence-based medicine and is often taught in courses for physicians about literature searching. Our results support the use of this PubMed filter.

The authors also point out that the filters were infrequently used by the sample.  Unless you know they're there, they're difficult to stumble upon.  Perhaps they can be integrated into the main search in some way.  

 The abstract in PubMed.