As one might expect they would. This article in PLoS Medicine ends with this conclusion:
Not surprisingly, journal publishers are not too keen on this idea. In this article:
“PLoS Medicine needs to take a basic course in the First Amendment and the history of American journalism,” he said. “Journals advance the science of medicine and play a critical role in the diffusion of innovation in clinical treatment, mostly at the expense of the drug industry. What the drug industry gets in the bargain is access to prescribers and the opportunity to be kicked around routinely by fiercely independent journal editors. For all its perceived faults, it's a great system that benefits doctors and their patients.”