1. Advanced Cardiac & Vascular Centers, Grand Rapids, MI, USA
2. Department of Clinical and Scientific Affairs, Cardiovascular Systems, Inc., St. Paul, MN, USA
3. Vascular Division, Premier Surgical Associates, Knoxville, TN, USA
4. Tenet Florida Cardiovascular Care, Delray Beach, FL, USA
5. Carolinas Medical Center and Sanger Heart & Vascular Institute, Vascular Surgery, Charlotte, NC, USA
6. UCLA Medical Center, Los Angeles, CA, USA
7. North Carolina Heart and Vascular, Rex Hospital, UNC School of Medicine, Raleigh, NC, USA