Clinicians cannot be expected to perform that kind of search on PubMed. This is what medical librarians do, and they do it very well. But that is not the whole story. There are major inefficiencies in the medical library. Information flows in medical libraries are not adequate to meet the increasing need to deliver published evidence to the point of care.
Medical libraries have an interesting relationship with online information.
Before there was a World Wide Web, even before there were personal computers, medical librarians were searching Medline. Despite their head start in online access to information, medical libraries have fallen behind in the area of serving information to their customers. A medical library might use the Internet to perform a literature search, but the clinician that requested the search still receives the search results printed out on paper, or pasted into a Word document. Clinicians who need monthly updates get monthly hard copies or Word documents. The current state of EBM information flow produces fragmented, non-searchable lists of citations.