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Frei, H; Everts, R; von Ammon, K; Kaufmann, F; Walther, D; Schmitz, S-F Hsu; Collenberg, M; Steinlin, M; Lim, C; Thurneysen, A (2007). Randomised controlled trials of homeopathy in hyperactive children: treatment procedure leads to an unconventional study design. Experience with open-label homeopathic treatment preceding the Swiss ADHD placebo controlled, randomised, double-blind, cross-over trial. Homeopathy, 96(1), pp. 35-41. Oxford: Elsevier 10.1016/j.homp.2006.11.004
