Growth hormone-releasing activity of Hexarelin, a new synthetic hexapeptide, after intravenous, subcutaneous, intranasal and oral administration in man. - Ghigo,E.; Arvat,E.; Gianotti,L.; Imbimbo,B.P.; Lenaerts,V.; Deghenghi,R.; Camanni,F. (J Clin Endocrinol Metab)