The national quality assurance process for treatment of overweight and obesity among children and young people in Germany. European Congress on Obesity - Reinhard Mann and Monika Bullinger and Cornelia Goldapp and Reinhard W. Holl and Ulrike Hoffmeister and Ulrike Ravens-Sieberer and Thomas Reinehr and Andreas van Egdmond-Fröhlich and Joachim Westenhöfer (2008)