Ghrelin, a novel growth hormone-releasing acylated peptide, is synthesized in a distinct endocrine cell type in the gastrointestinal tracts of rats and humans - Date, Y; Kojima, M; Hosoda, H; Sawaguchi, A; Mondal, M S; Suganuma, T; Matsukura, S; Kangawa, K; Nakazato, M (Endocrinology, 2000)