NEOADJUVANT CHEMORADIOTHERAPY FOR LOCALLY ADVANCED RECTAL CANCER WITH PERITUMORAL ABSCESSES AND FISTULAS Article Gordeyev S., Ivanov V., Fedianin M., Chernikh M., Kozlov N., Petrov L., Erygin D., Gridasov I., Kaushanskiy V., Feoktistov D., Mamedli Z. Strahlentherapie und Onkologie. Springer Science and Business Media Deutschland GmbH. 2021.