Comparison of two treatment durations (6 days and 14 days) of a low molecular weight heparin with a 6-day treatment of unfractionated heparin in the initial management of unstable angina or non-Q wave myocardial infarction: FRAX.I.S (FRAXiparine in Acute Ischaemic Syndrome) - The FRAX.I.S Study Group,null. (Eur Heart J, 1999)