9Piccione G, Percipalle M, Fazio F, et al. Circadian variation of blood clotting time and circulating vitamin K in the athletic horse [J]. Comp Clin Path, 2005,14: 86-89.
10Soulban C,, Labrecque G. Circadian rhythms of blood clotting time and coagulation factors II, VII, IX and X in rats [J]. Life- Sci, 1989, 45 (25) : 2485-2489.
