TY - RPRT TI - Quantitative venous severity scoring using venous arterial flow index by duplex sonography. AU - Alessandro Frullini PY - 2003 DO - 10.1046/j.1524-4725.2003.29165.x UR - https://pubmed.ncbi.nlm.nih.gov/12790911/ ID - 12790911 ER -