1 Vascular and Interventional Radiology, Department of Radiology, Mayo Clinic Arizona, 5777 E. Mayo Blvd, Phoenix, AZ 85054. Electronic address: patel.indravadan@mayo.edu.
2 Interventional Radiology, Department of Radiology, University Hospitals Cleveland Medical Center, 11100 Euclid Ave, Cleveland, OH 44106.
3 Department of Interventional Radiology, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030.
4 Vascular Medicine, Division of Cardiology, Massachusetts General Hospital, 55 Fruit St, Boston, MA 02114.