Division of Nephrology and Endocrinology, The University of Tokyo, Graduate School of Medicine, Tokyo, Japan. Department of Nephrology, Nagoya City University Graduate School of Medical Sciences, Aichi, Japan. Division of Nephrology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan. Graduate School of Health Care Sciences, Jikei Institute, Osaka, Japan. Medicines Development, GlaxoSmithKline, Tokyo, Japan, reiko.2.nagai@gsk.com. Medicines Development, GlaxoSmithKline, Tokyo, Japan. Medical Affairs & Development, GlaxoSmithKline, Tokyo, Japan. Biomedical Data Sciences, GlaxoSmithKline, Tokyo, Japan. Clinical Sciences, GlaxoSmithKline, Uxbridge, United Kingdom. Clinical Sciences, GlaxoSmithKline, Collegeville, Pennsylvania, USA.