Overexpression of the growth-hormone-releasing hormone gene in acromegaly-associated pituitary tumors. An event associated with neoplastic progression and aggressive behavior. - Thapar K; Kovacs K; Stefaneanu L; Scheithauer B; Killinger DW; Lioyd RV; Smyth HS; Barr A; Thorner MO; Gaylinn B; Laws ER Jr (The American journal of pathology, 1997)