1. The Department of Cardiovascular Medicine, Mayo Clinic , 200 First Street SW, Rochester, MN, USA
2. Institute for Clinical and Experimental Medicine (IKEM) , Prague , Czech Republic
3. Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Mayo Clinic , Rochester, MN, USA
4. Department of Quantitative Health Sciences, Division of Clinical Trials & Biostatistics, Mayo Clinic , Jacksonville, FL, USA