> Actual article (the BMJ peer reviewed analysis) is behind a paywall. I might be barking up the wrong tree here but if you're referring to http://www.bmj.com/

> Actual article (the BMJ peer reviewed analysis) is behind a paywall. I might be barking up the wrong tree here but if you're referring to http://www.bmj.com/content/358/bmj.j3418 http://www.bmj.com/content/358/bmj.j3418 then that page has an open(-access) link to http://www.bmj.com/content/358/bmj.j3418.full.pdf http://www.bmj.com/content/358/bmj.j3418.full.pdf.