* Andrasik F. Biofeedback in headache: An overview of approaches and evidence. Cleve Clin J Med. 2010;77(3): S72–6. ccjm.org/content/77/Suppl_3/S72.abstract
* Diener HC, Kronfeld K, Boewing G, et al. Efficacy of acupuncture for the prophylaxis of migraine: a multicentre randomised controlled clinical trial. Lancet Neurol. 2006;5(4):310–316. http://bit.ly/L4Vjut
* Linde K, Streng A, Jürgens S, et al. Acupuncture for Patients With Migraine: a randomized controlled trial. JAMA 2005;293(17):2118–2125. http://bit.ly/KfSSWP
* Lipton RB, Göbel H, Einhäupl KM, et al. Petasites hybridus root (butterbur) is an effective preventive treatment for migraine. Neurology 2004;63:2240–2244. neurology.org/content/63/12/2240
* Sándor PS, Di Clemente L, Coppola G, et al. Efficacy of coenzyme Q10 in migraine prophylaxis: A randomized controlled trial. Neurology 2005;64:713–715. neurology.org/content/64/4/713.abstract