1. Department of Medical Science and Cardiorenal Medicine; Yokohama City University Graduate School of Medicine; Yokohama Japan
2. Center for Health Service Sciences; Yokohama National University; Yokohama Japan
3. Soubudai Nieren Clinic; Zama Japan
4. Yokodai Central Clinic; Yokohama Japan
5. Kohsaikai Kamioooka Jinsei Clinic; Yokohama Japan