References: 1. LurieF, Creton D, Eklof B, Kabnick LS, Kistner RL, Pichot O, et al. Prospective randomized study of endovenous radiofrequency obliteration. (Closure procedure) versus ligation and stripping in aselected patient population (EVOLVeS Study). J Vasc Surg 2003;38;2:207-14 2. Hinchliffe RJ, et al. A prospective randomised controlled trial of VNUS Closure versus Surgery for the treatment of recurrent long saphenous variscose veins. Eur J Vasc Endovasc Surg 2006 Feb;31;2:212-218 3. Almeida JI, Kaufman J, Göckeritz O, et al. Radiofrequency endovenous ClosureFast versus laser ablation for the treatment of great saphenous reflux: a multicenter, single-blinded, randomized study (RECOVERY Study). J Vasc Interv Radiol. 2009;20:752-759. 4. L. H. Rasmussen, M. Lawaetz, L. Bjoern, B. Vennits, A. Blemings and B. Eklof, Randomized Clinical Trial Comparing Endovenous Laser Ablation, Radiofrequency Ablation, Foam Sclerotherapy and Surgical Stripping for Great Saphenous Varicose Veins. British Journal of Surgery Society Ltd., Wiley Online Library, www.bjs.co.uk, March 15, 2011. 5. Proebstle T. et al. Three-year European follow-up of endovenous radiofrequency-powered segmental thermal ablation of the great saphenous vein with or without treatment of calf varicosities. JVS; July2011. ClosureFast is a trademark of a Medtronic company.