Akiko Shiotani1, David Y Graham2. 1. Department of Internal Medicine, Kawasaki Medical School, 577 Matsushima Kurashiki City, Okayama Prefecture 701-0192, Japan. Electronic address: shiotani@med.kawasaki-m.ac.jp. 2. Department of Medicine, Michael E. DeBakey VAMC, Baylor College of Medicine, 2002 Holcombe Boulevard, Room 3A-318B (111D), Houston, TX 77030, USA. Electronic address: dgraham@bcm.edu.