Sara V R, Stuart M C, Rutherford R, Moore S, Lazarus L
J Clin Endocrinol Metab. 1978 Nov;47(5):1129-31. doi: 10.1210/jcem-47-5-1129.
Brain growth-promoting activity and somatomedin activity were assessed in serum collected from patients with pituitary disorders of GH secretion. Brain growth-promoting activity correlated with somatomedin activity in serum, and both rose in response to GH administration.