1. Division of Cardiovascular Health and Diseases; University of Cincinnati; Cincinnati Ohio
2. Cardiovascular Section; University of Oklahoma Health Sciences Center; Oklahoma City Oklahoma USA
3. Department of Cardiology; St. Antonius Hospital; Nieuwegein The Netherlands
4. Department of Cardiology, BG-Kliniken Bergmannsheil; University of Bochum; Bochum Germany
5. Department of Cardiology; Maastricht University Medical Center; Maastricht The Netherlands
6. Department of Surgery; Texas Tech University HSC; Lubbock Texas USA
7. Division of Pulmonary and Critical Care Medicine; Texas Tech University HSC; Lubbock Texas USA