1. Division of Cardiology, Department of Medicine; Northwestern University Feinberg School of Medicine; Chicago IL USA
2. Department of Medicine; Henry Ford Health System; Detroit MI USA
3. Department of Medicine; University of Toronto; Toronto Canada
4. Department of Cardiovascular and Respiratory Studies, Hull York Medical School; University of Hull; Kingston-upon-Hull UK
5. ANMCO Research Center; Florence Italy
6. Department of Medicine; University of California; Los Angeles CA USA
7. Division of Endocrinology, Department of Medicine; University of Utah; Salt Lake City USA