Patient disposition. Chart of patients by randomized regimen. * indicates baseline or end-of-treatment CUS/PLS not done or not evaluable or not in time window. # indicates CUS/PLS performed more than 10 days after cessation of study medication, insufficient compliance, not allowed comedication. § indicates less than 4 days of LMWH, insufficient INR control, or CUS/PLS performed more than 10 days after cessation of study medication.