An Open-label Safety Trial of Kinetics and Metabolic Effects of Orally-administered L-ornithine Hydrochloride in Healthy Volunteers ―A Study of its Effects, Particularly on Plasma L-ornithine Levels and Retinal Function― Masahiko Morita and et al., 薬理と治療, 41, 779-787 (2013), DOI:http://dx.doi.org/