Circulating activities during constant infusion of heparin or a low molecular weight derivative (Enoxaparine): failure to demonstrate any circadian variations - Toulon, P; Vitoux, J F; Leroy, C; Lecompte, T H; Roncato, M; Motobashi, Y; Aiach, M; Fiessinger, J N (Thromb Haemost, 1987)