1. From the Department of Angiology, University of Basel Medical School, Basel, Switzerland (K.-H.L., K.A.J.); the Department of Vascular Sciences, St George’s Hospital, London, UK (J.A.D.); Schering AG, Berlin, Germany (C.-S.S.); and the University of Colorado Health Sciences Center, Section of Vascular Medicine and the Colorado Prevention Center, Denver, Colo (W.R.H.). Members of the Basel PAD Clinical Trial Methodology Group are listed in the Appendix.