1. Division of Nephrology and Hypertension; Mayo Clinic; Rochester Minnesota USA
2. Department of Internal Medicine; Mayo Clinic; Rochester Minnesota USA
3. Department of Nephrology; Tufts Medical Center; Boston Massachusetts USA
4. Department of Internal Medicine; Bassett Medical Center; Cooperstown New York USA
5. Department of Preventive and Social Medicine; Faculty of Medicine; Siriraj Hospital; Mahidol University; Bangkok Thailand