First in human trial of CEB-01 for retroperitoneal soft tissue sarcoma - González, JA; Sebio, A; Beveridge, RD; Castellanos, JFO; Andújar, RL; Alvarez, RA; Asencio, JM; Martin-Broto, J; Hindi, N; Jimenez, M; Villarejo-Campos, P; García, CS; et al. (ANNALS OF ONCOLOGY, 2023)