In reply to the Letter to the Editor by Chen and Lui regarding "Radiotherapy enhances uptake and efficacy of 90Y-cetuximab: A preclinical trial" by A Dietrich et al. (August 2021) - Dietrich, Antje; Andreeff, Michael; Koi, Lydia; Bergmann, Ralf; Schubert, Maik; Schreiner, Lena; Löck, Steffen; Sihver, Wiebke; Freudenberg, Robert; Hering, Sandra; Pietzsch, Hans-Jürgen; Steinbach, Jörg; et al.