Received: 8 February 2019
Accepted: 5 June 2019
First Online: 24 June 2019
Ethics approval and consent to participate
: This research was approved by the institutional review board of two institutions: Hokko Memorial Hospital and Sapporo Ryokuai Hospital. All patients signed written informed consents to undergo exercise testing and cardiac rehabilitation.
: Not applicable.
: The authors declare that they have no competing interests.