Psychometric Evaluation of the German Version of the Impact of Weight on Quality of Life-Lite (IWQOL-Lite) Questionnaire - Mueller, A.; Holzapfel, C.; Hauner, H.; Crosby, R. D.; Engel, S. G.; Mühlhans, B.; Kolotkin, R. L.; Mitchell, J. E.; Horbach, T.; Zwaan, M. de (Experimental and Clinical Endocrinology & Diabetes, 2011)