Acupuncture in patients with tension-type headache: randomised controlled trial - Melchart, D; Streng, A; Hoppe, A; Brinkhaus, B; Witt, C; Wagenpfeil, S; Pfaffenrath, V; Hammes, M; Hummelsberger, J; Irnich, D; Weidenhammer, W; Willich, SN; Linde, K (BMJ, 2005)
7513