1. Department of Anesthesiology and Perioperative Medicine, Division of Pain Medicine, Mayo Clinic , Rochester, MN, USA
2. Pain Medicine Fellow, Department of Anesthesiology, University of Pittsburgh School of Medicine , Pittsburgh, PA, USA
3. Pain Medicine Fellow, Department of Anesthesiology, New York-Presbyterian Hospital/Weill Cornell Medicine , New York, NY, USA
4. Department of Anesthesiology and Pain Medicine, The Spine and Nerve Center of the Virginias , Charleston, WV, USA