1. Department of Cardiology Saiseikai Yokohama City Eastern Hospital Yokohama Japan
2. Department of Cardiology Tokushima Red Cross Hospital Komatsushima Japan
3. Department of Cardiology Tokyo Heart Center Shinagawa‐ku Japan Tokyo
4. Department of Cardiology Seirei Hamamatsu General Hospital Hamamatsu Shizuoka Japan
5. Department of Cardiovascular Medicine the Cardiovascular Institute Tokyo Japan
6. Department of Cardiology Shin‐Koga Hospital Kurume Japan
7. Cardiology Center, Sanda City Hospital Sanda Japan
8. Department of Cardiology Kurashiki Central Hospital Kurashiki Okayama Japan
9. Japanese CTO‐PCI Expert Foundation Kurashiki Japan