Medical research in general is dubious at best. See for example http://www.plosmedicine.org/article/info:doi/10.1371/journal.pmed.0020124 http://www.plosmedicin

Medical research in general is dubious at best. See for example http://www.plosmedicine.org/article/info:doi/10.1371/journal.pmed.0020124 http://www.plosmedicine.org/article/info:doi/10.1371/journal... There's even a startup trying to work around it: http://www.metamed.com/ http://www.metamed.com/. They look for papers related for a given condition on request, trying to find ones that are actually well done and promising.