("retraction of publication".pt. or "Published Erratum".pt. or "comment".pt. or (comment or comments or correction or corrections or "expression of concern" or replies or reply or ((retraction or withdrawal) and (note or notice))).ti.)
Note if you are conducting a systematic review: Use this search after study selection but before data extraction. You will need to be creative as there is no consistency in how the record appears. However, it is critical to check for retracted studies as well as corrections after study selection but PRIOR to data extraction to avoid including invalid information in the analyses. Also consider searching the Retraction Watch Database.
EX: Try a search with the first author's name as well as a search with keywords from the title & abstract, then combine with OR to view the full list.
wakefield aj.au. and ("retraction of publication".pt. or "Published Erratum".pt. or "comment".pt. or (comment or comments or correction or corrections or "expression of concern" or replies or reply or ((retraction or withdrawal) and (note or notice))).ti.
(((measles or mmr) and autism).ti,ab,kf. and autism.ti,ab,kf.) and ("retraction of publication".pt. or "Published Erratum".pt. or "comment".pt. or (comment or comments or correction or corrections or "expression of concern" or replies or reply or ((retraction or withdrawal) and (note or notice))).ti.)
1 or 2