The authors regret that during a recent review of this work, an erroneous calculation was uncovered. In our discussion we estimated the number of VAD patients annually with recent manipulation in the U.S. If the annual rate of VAD patients in the U.S. population was approximately (318,857,056 × 1.0/100.000) 3188, and of those patients 6.9% received a cervical manipulation, the correct number should be (3188 × 0.069) 220. This had been accidentally calculated as 220,011 instead of 220. Although it does not change the overall conclusions or discussion of the paper, the authors would like to thank dr. Clum for his attentiveness and apologize for any inconvenience caused.
- cervical spine
- systematic review