Impact of COVID-19 on Quality of Life in Long-Term Advanced Rectal Cancer Survivors - Blasko, Daniel; Schweizer, Claudia; Fitz, Tim; Schröter, Christoph; Sörgel, Christopher; Kallies, Annett; Fietkau, Rainer; Distel, Luitpold Valentin (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2023)