1. Department of Medical and Health Information Management, National Cerebral and Cardiovascular Center , Kishibe-Shimmachi 6-1, Suita, Osaka 564-8565 , Japan
2. Department of Cardiovascular Medicine, Nara Medical University , Shijo-cho 840, Kashihara, Nara 634-8521 , Japan
3. Department of Biostatistics, National Cerebral and Cardiovascular Center , Kishibe-Shimmachi 6-1, Suita, Osaka 564-8565 , Japan
4. Department of Public Health, Health Management and Policy, Nara Medical University , Shijo-cho 840, Kashihara, Nara 634-8521 , Japan
5. Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine , Yamadaoka 1-1, Suita, Osaka 565-0871 , Japan
6. Department of Medical Informatics, Osaka University Graduate School of Medicine , Yamadaoka 1-1, Suita, Osaka 565-0871 , Japan
7. Open Innovation Center, National Cerebral and Cardiovascular Center , Kishibe-Shimmachi 6-1, Suita, Osaka 564-8565 , Japan
8. Nara Prefecture Seiwa Medical Center , Mimuro 1-14-16, Sango-cho, Ikoma, Nara 636-0802 , Japan