Prevention and Treatment of Obesity Evidence-based Guideline of the DDG Version 05/2007 1 Prevention and Treatment of Obesity Evidence-based Guideline of the DDG Authors: H. Hauner (responsible), G. Buchholz, A. Hamann, B. Husemann, B. Koletzko, H. Liebermeister, M. Wabitsch, J. Westenhöfer, A. Wirt