GH1 and pituitary tumor: To further verify the microarray results, 37 primary pituitary tumour specimens, comprising 9 prolactinomas, 20 nonfunctioning pituitary adenomas, 6 GH (growth hormone) adenomas and 2 ACTH (adreno-cortico-tropic-hormone) tumours, and 3 normal pituitary glands were used (Supplementary Table 2).