Summary of 88 articles that warranted retraction.

Numbers in parentheses are numbers of articles or of retraction notices. Colcollective notice of retraction published. 1erratum; 2statement. acomplete reference of retracted article is listed in table of content; bretraction is listed in table of content but reference is lacking; creason not described in notice but notice refers to an editorial giving the reason; dPDF of one article that was published by a former publisher not marked; ePDF accessible but original text, figures, tables deleted; fWatermark present but almost invisible. Column “Month” refers to year 2011. Since January 2013, one publisher (Wiley-Blackwell) has modified its retraction notices after learning of our findings.