And now, e-publication bias

"We investigated the association between funding of biomedical research by industry and author-paid open access publishing in the Annals of the Rheumatic Diseases, a journal in the BMJ Group....Of 216 extended reports, 71 had received funding from an industrial sponsor. A significantly higher proportion of industry funded studies were published unlocked (12/71 (17%) v 11/145 (8%))....Our results show that author-paid open access publishing preferentially increases accessibility to studies funded by industry. Our results show that author-paid open access publishing preferentially increases accessibility to studies funded by industry. This could favour dissemination of pro-industry results. We suggest the term e-publication bias for this emerging type of publication bias in open access hybrid journals...."