Randomized controlled pilot study: pain intensity and pressure pain thresholds in patients with neck and low back pain before and after traditional East Asian „gua sha“ therapy. - Lauche, R; Wübbeling, K; Lüdtke, R; Cramer, H; Choi, K E; Rampp, T; Michalsen, A; Langhorst, J; Dobos, G J (Am J Chin Med, 2012)