title: Duplex ultrasonography for assessment of venous valvular function of the lower limb.
authors.forename: N R
authors.initials: NR
authors.lastname: Lagattolla
authors.forename: K G
authors.initials: KG
authors.lastname: Burnand
mesh_terms: D001775:Blood Circulation; D006801:Humans; D007866:Leg / Q000098:blood supply*; D018616:Ultrasonography, Doppler, Duplex; D014680:Veins / Q000502:physiology