On 2016 Apr 03, Wichor Bramer commented:

Contrary to what the authors describe here it is not so much the status of the publication (e-pub ahead of print: pubstatusaheadofprint) that causes records to be missed in Medline as it is the status of the record in the database (as supplied by publisher: publisher[sb]). All articles that are e-pub ahead of print are part of the subset as supplied by publisher (a search for _ publisher[sb] OR pubstatusaheadofprint_ generates the exact number of hits as publisher[sb] alone).

Apart from that I wonder why the authors choose to exclude several specific sets (NOT pubstatusnihms NOT pubstatuspmcsd NOT pmcbook) but search Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations where the Non-Indexed Citations contain the articles in pubstatusnihms, pubstatuspmcsd and pmcbook. And I wonder what the use is of searching in process citations in PubMed (inprocess[sb]) when their Ovid MEDLINE search already contains the In-Process articles.

Therefore there is no need to search with that complicated structure presented here, a searcher can obtain equal results adding publisher[sb]. This is a practice common for librarians and medical information specialists.

On 2016 Apr 03, Wichor Bramer commented:

Contrary to what the authors describe here it is not so much the status of the publication (e-pub ahead of print: pubstatusaheadofprint) that causes records to be missed in Medline as it is the status of the record in the database (as supplied by publisher: publisher[sb]). All articles that are e-pub ahead of print are part of the subset as supplied by publisher (a search for _ publisher[sb] OR pubstatusaheadofprint_ generates the exact number of hits as publisher[sb] alone).

Apart from that I wonder why the authors choose to exclude several specific sets (NOT pubstatusnihms NOT pubstatuspmcsd NOT pmcbook) but search Ovid MEDLINE(R) In-Process & Other Non-Indexed Citations where the Non-Indexed Citations contain the articles in pubstatusnihms, pubstatuspmcsd and pmcbook. And I wonder what the use is of searching in process citations in PubMed (inprocess[sb]) when their Ovid MEDLINE search already contains the In-Process articles.

Therefore there is no need to search with that complicated structure presented here, a searcher can obtain equal results adding publisher[sb]. This is a practice common for librarians and medical information specialists.