Letter to the editor, re: Nylaende M, Abdelnoor M, Stranden E, Morken B, Sandbaek G, Risum O, et al. The Oslo balloon angioplasty versus conservative treatment study (OBACT)--the 2-years results of a single centre, prospective, randomised study in patients with intermittent claudication. Eur J Vasc Endovasc Surg. 2007;33:3-12.