8. Aspirin based medication (> 325 mg/day or clopidogrel > 75mg/day) present or recent (in a period of 10 days from the first bevacizumab infusion). Medication with oral anticoagulants agents or parenteral medication on full doses (e.g. in a therapeutic range) or the use of thrombolytic agents with present and recent therapeutic intentions (in a period of 10 days prior to the first bevacizumab infusion). The prophylactic medication with anticoagulants is permitted