Jakobsen AK, Christensen R, Persson R, et al. Open access publishing; and now, e-publication bias. BMJ 2010;340. doi:10.1136/bmj.c2243
'E-publication bias' is identified in this small study of articles published in Annals of the Rheumatic Diseases. The research suggests that author-paid open access publishing preferentially increases accessibility to industry-funded research, perhaps favouring distribution of pro-industry results.