BEP or PEb was administered to 92 patients. Only nine (9.8%) had formal two-plasma sample radio-isotope GFR assessments whilst calculated GFRs were performed in only six patients. Only 22/92 (23.9%) patients had formal audiology assessments. In the untested group, unavailability of services was cited for five patients. Hearing loss (ungraded) was reported in 19/22 (86.3%) patients.