Study of Bevacizumab Alone or Combined With Capecitabine and Oxaliplatin as Support Therapy in Metastatic Colorectal Cancer Patients

XELOXA Bevacizumab: 7,5 mg/kg, day 1 Oxaliplatino: 130 mg/m2 ; day 1 Capecitabine: 1000 mg/m2 bid, oral, day 1-14 One cycle every 3 weeks

"XELOXA-A Bevacizumab: 7,5 mg/kg, day 1 Oxaliplatino: 130 mg/m2 ; day 1 Capecitabine: 1000 mg/m2 bid, oral, day 1-14 during 6 cycles followed by Bevacizumab until disease progression or premature drop out of study.~One cycle every 3 weeks"