Functional MRI in healthy subjects during acupuncture: different effects of needle rotation in real and false acupoints.
Fang JL, Krings T, Weidemann J, Meister IG, Thron A. Functional MRI in healthy subjects during acupuncture: different effects of needle rotation in real and false acupoints. Neuroradiology. 2004 May; 46(5):359-62.