Received: 18 August 2019
Accepted: 2 January 2020
First Online: 10 January 2020
Ethics approval and consent to participate
: This study was reviewed and approved by the local Ethics Committee of Tottori University Faculty of Medicine and registered under 1601A115. All methods were performed in accordance with the relevant guidelines and regulations.
: Consent for the collection of data was obtained from the patients or legal guardians.
: The authors declare that they have no competing interests.