Continuous Efforts Leads to a Value for Hypertensive Patients: Development of a Casual Smart Na/K Meter and Smart Na/K Application Linked by NFC to Android. - Kenju Akai; Tetsuya Hirotomi; Aoi Mishima; Keiko Aoki; Tsunetaka Kijima; Toru Nabika (Int. J. Autom. Technol., 2020)