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Babilas, P. and Kohl, E. and Maisch, T. and Bäcker, H. and Gross, B. and Branzan, A. L. and Bäumler, W. and Landthaler, M. and Karrer, S. and Szeimies, R.-M. (2006) In vitro and in vivo comparison of two different light sources for topical photodynamic therapy. The British journal of dermatology 154 (4), pp. 712-718.