Figure 2. Depiction of utilized chemotherapy and radiotherapy.

(A) Schematic overview of the used chemotherapeutic agents. diff. regimen, studies comparing/using different drug regimen (n = 28); no CTx, no chemotherapy applied (only radiotherapy). (B) Schematic overview of the applied radiation doses. Studies are summarized within a range of applied doses. Data included are per protocol, not all patients received the stated dose. diff. regimen, different radiation doses applied; not specified, radiation applied, dose not specified; no RTx, no radiotherapy applied (only chemotherapy).