The authors of Chiropractic care and the risk of vertebrobasilar stroke: results of a case\u2013control study in U.S. commercial and Medicare Advantage populations also like the Cassidy study,\n The work by Cassidy, et al. [32] has been qualitatively appraised as one of the most robustly designed investigations of the association between chiropractic manipulative treatment and VBA stroke\nwhich was done in Canada.\nHey. Lets see if we can reproduce the same flawed\xa0in the US. \xa0Then we can have two bad studies, which is better than one bad study.