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Hamre, Harald J., Claudia M. Witt, Anja Glockmann, Renatus Ziegler, Gunver S. Kienle, Stefan N. Willich, και Helmut Kiene. Outcome of Anthroposophic Medication Therapy in Chronic Disease: A 12-month Prospective Cohort Study. Dove Medical Press, 2009.

Hamre, Harald J., et al. Outcome of Anthroposophic Medication Therapy in Chronic Disease: A 12-month Prospective Cohort Study. Dove Medical Press, 2009.