Funding for this research was provided by:
Japan Society for the Promotion of Science (21H03273, 18K10645)
Received: 9 September 2020
Accepted: 29 April 2021
First Online: 28 May 2021
: This study received approval from the Ethics Committee of the University of Hyogo (No.2019F21). This study was a retrospective cohort study with secondary data collected by Sumoto City. Permission to provide data for this study was obtained in accordance with Article 18 of the Sumoto City Information Disclosure Ordinance (Sumoto City Ordinance No. 17, 2006) and Article 38 of the Sumoto City Personal Information Protection Ordinance (Sumoto City Ordinance No. 18, 2006).
: All author approved the manuscript.
: None of the authors have a conflict of interest.