1. Division of Cardiology, School of Medicine, West Virginia University, 1 Medical Center Drive, Morgantown, WV, USA
2. Department of Medicine, CardioVascular Center Frankfurt, Seckbacher Landstraße 65, Frankfurt am Main, Germany
3. Anglia Ruskin University, Cambridge Campus, East Rd, Cambridge, UK
4. Yunnan Hospital Fuwai, Intersection of Shahe Beilu and Jinchuan Lu, Kunming, China
5. University of California, 550 16th Street, San Francisco, CA, USA
6. Department of Cardiology, Mayo Clinic School of Medicine, 200 1st St SW, Rochester, MN, USA