The American Journal of Physiology 273 (Endocrinol.Metab.36), 891-897,1997 Existence of two nonlinear elimination mechanisms for hepatocyte growth factor in rats KE-XIN LIU, YUKIO KATO, MOTOHIRO KATO, TAI-ICHI KAKU, TOSHIKAZU NAKAMURA, and YUICHI SUGIYAMA1