1. Brittenden J Randomised controlled trial comparing foam sclerotherapy, alone or in combination with endovenous laser therapy, with conventional surgery as a treatment for varicose veins (ISRCTN 51995477) www.controlled-trials.com/ISRCTN51995477
2. A randomized trial comparing treatments for varicose veins;Brittenden;New England Journal of Medicine,2014
3. Clinical effectiveness and cost-effectiveness of foam sclerotherapy, endovenous laser ablation and surgery for varicose veins: results from the Comparison of LAser, Surgery and foam Sclerotherapy (CLASS) randomised controlled trial;Brittenden;Health Technology Assessment (Winchester, England),2015
4. ISRCTN51995477 The CLASS study. Comparison of LAser, Surgery and foam Sclerotherapy. Research protocol (Protocol 09PRT/2275; EudraCT 2008-001069-26) Randomised controlled trial comparing foam sclerotherapy, alone or in combination with endovenous laser therapy, with conventional surgery as a treatment for varicose veins NIHR Health Technology Assessment Programme www.nets.nihr.ac.uk/__data/assets/pdf_file/0004/51448/PRO-06-45-02.pdf
5. Cost-effectiveness of ultrasound-guided foam sclerotherapy, endovenous laser ablation or surgery as treatment for primary varicose veins from the randomized CLASS trial;Tassie;British Journal of Surgery,2014