Brain Tumours

The best measure for assessing effectiveness of different forms of radiotherapy in a cohort of patients with acromegaly is 1. median time to normalisation of GH (time when half of the patients achieve normal GH) 2. median time to normalisation of IGF-1 3. median time to halving of GH 4. tumour control at 5 years 5. all of these 6. none of these