Received: 11 April 2018
Accepted: 2 July 2018
First Online: 7 August 2018
Ethics approval and consent to participate
: Protocol of this study was approved by the Ethics Committee of Kanazawa University (approval no. 1462), as well as by the ethics committees of all participating hospitals, which were Ishikawa Prefectural Central Hospital, Houju Memorial Hospital, Komatsu Municipal Hospital, and Japan Community Healthcare Organization Kanazawa Hospital (approval no. 507, 14–2, 10 and 13–17-00, respectively).
: Not applicable.
: The authors declare that they have no conpeting interest.
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