Is the sham acupuncture group a real sham control group? Comments on "Vas J et al. Acupuncture in patients with acute low back pain: a multicentre randomised controlled clinical trial [PAIN® 2012;153(9):1883-9]"

Pain. 2013 Nov;154(11):2575-2576. doi: 10.1016/j.pain.2013.08.010. Epub 2013 Aug 17.

¹ Department of Clinical Epidemiology, 2nd Affiliated Hospital, Guangzhou University of Chinese Medicine, 111 Da De Rd, Guangzhou, China Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.

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