1. Department of Internal Medicine and Nephrology, Wake Forest School of Medicine, Winston Salem, NC
2. David Geffen School of Medicine at UCLA
3. Department of Internal Medicine/Nephrology, Medical Faculty Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
4. School of Management, Rector Emeritus Formerly Institut of Experimental Endocrinology, Slovak Academy of Sciences, Bratislava, Slovak Republic