In the article “Physical Activity in the Prevention and Treatment of Colorectal Carcinoma” by Martin Halle and Michael H. Schoenberg (Deutsches Ärzteblatt International, 30 October 2009; issue 44), the following book chapter should have been cited as an important bibliographical source: Lücking FP, Schmid RM: Kolorektales Karzinom. In: Halle M, Schmidt-Trucksäss A, Hambrecht R, Berg A (eds.): Sporttherapie in der Medizin – Evidenzbasierte Prävention und Therapie. Stuttgart: Schattauer-Verlag 2008; 261–72.
The authors deeply regret this omission.