1. Biological Sciences, Tokyo Institute of Technology, Yokohama 226-8501, Japan;
2. Physiology & Biomedical Engineering, Mayo Clinic College of Medicine, Rochester, Minnesota 55905;
3. Nephrology & Hypertension, Mayo Clinic College of Medicine, Rochester, Minnesota 55905;
4. O'Brien Urology Research Center, Mayo Clinic College of Medicine, Rochester, Minnesota 55905;