1 Department of Medical Information Science, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan; Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan. Electronic address: mishii4@kumamoto-u.ac.jp.
2 Department of Medical Information Science, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.
3 Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan.