Ghrelin strongly stimulates growth hormone release in humans - Takaya, K; Ariyasu, H; Kanamoto, N; Iwakura, H; Yoshimoto, A; Harada, M; Mori, K; Komatsu, Y; Usui, T; Shimatsu, A; Ogawa, Y; Hosoda, K; Akamizu, T; Kojima, M; Kangawa, K; Nakao, K (J Clin Endocrinol Metab, 2000)