Table 2 Excluded studies with reasons for exclusion.

Bedognetti et al. [23, 24]

Study did not evaluate our predefined comparison^a

Boccardo et al. [37]

No relevant topic^b

Eaton et al. [25]

Only abstract available and data not sufficiently detailed to include in review^c

Parker et al. [11]

No prostate cancer patients

Serretta et al. [38, 39]

Study did not evaluate our predefined comparison^d