Table 2.

Characteristics of the patient cohort

Tumour grade	Chemotherapy			Radiotherapy
Group A	Group B	Group C	Y	N
Low-grade	27	11	13	21	30
High-grade	21	39	44	86	18
Total	48	50	57	107	48

Note. Previous chemotherapy and radiotherapy treatments. Data are reported based on single studies, not on patients.