Figure 7

(A) Forest plot chart comparing microsurgery to radiotherapy in relation to fundamental frequency (f0) and (B) Funnel plot demonstrating that there was no heterogeneity in the evaluation of the fundamental frequency.

(A) Forest plot chart comparing microsurgery to radiotherapy in relation to fundamental frequency (f0) and (B) Funnel plot demonstrating that there was no heterogeneity in the evaluation of the fundamental frequency.