Efficacy of 12-month treatment with the GH receptor antagonist pegvisomant in patients with acromegaly resistant to long-term, high-dose somatostatin analog treatment: effect on IGF-I levels, tumor mass, hypertension and glucose tolerance - Colao, A; Pivonello, R; Auriemma, R S; De Martino, M C; Bidlingmaier, M; Briganti, F; Tortora, F; Burman, P; Kourides, I A; Strasburger, C J; Lombardi, G (Eur J Endocrinol, 2006)