Spine. 2009 May 15;34(11):E405-13.
Safety of chiropractic interventions: a systematic review.
Gouveia LO, Castanho P, Ferreira JJ.
A systematic review of data relating to adverse events from chiropractic treatment reveals no robust data to support the assertion from some sceptical critics that chiropractic is an unsafe treatment.
http://www.ncbi.nlm.nih.gov/pubmed/19444054?dopt=Abstract