Labels:text | screenshot | black | black and white | font | document OCR: a linear With external pituitary irradiation usin accelerator, a mean fall in GH levels of s been seventy-seven per cent after five years h years, obtained (Fig 3.22), and, at the end of ter m GH eighty-one per cent of patients have ser 'ml). The concentrations of less than 20mu/1 (10n n GH level effect is more rapid if the initiating seru H levels prior to radiotherapy is lower. Thus, if C me taken are greater than 50mu/1 (25ng/ml) the GH to less for there to be a fall of the average serur s versus than 5mu/1 (2.5ng/ml) is longer: six yea How four years if pretreatment serum GH is 50mu/l