aDivision of Vascular and Endovascular Surgery, Mayo Clinic, Rochester, MinnfDivision of Nephrology and Hypertension, Mayo Clinic, Rochester, MinnjDivision of Preventive, Occupational and Aerospace Medicine, Mayo Clinic, Rochester, MinnbJobst Vascular Center, Toledo, OhiocIndiana University School of Medicine, Indianapolis, InddUniversity of Lund, Helsingborg, SwedeneSchool of Medicine and Dentistry, University of Rochester, Rochester, NYgLohr Surgical Specialists, Cincinnati, OhiohSouthern Illinois University, Springfield, IlliUniversity of Washington School of Medicine, Seattle, WashkNew Jersey Medical School, University of Medicine and Dentistry of New Jersey, Newark, NJlUniversity of Alabama at Birmingham, Birmingham, AlamVA Boston Healthcare System, West Roxbury, MassnVenous Institute of Buffalo, North Tonawanda, NYoUniversity of Michigan Medical School, Ann Arbor, Mich