About the Authors

Ryoji Tominaga

Roles Conceptualization, Methodology, Project administration, Visualization, Writing – original draft

Affiliations Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan, Department of Orthopaedic and Spinal Surgery, Aizu Medical Center, Fukushima Medical University, Fukushima, Japan, Department of Clinical Epidemiology, Graduate School of Medicine, Fukushima Medical University, Fukushima, Japan

Noriaki Kurita

Roles Formal analysis, Methodology, Supervision, Writing – original draft

kuritanoriaki@gmail.com

Affiliations Department of Clinical Epidemiology, Graduate School of Medicine, Fukushima Medical University, Fukushima, Japan, Department of Innovative Research and Education for Clinicians and Trainees, Fukushima Medical University Hospital, Fukushima, Japan, Center for Innovative Research for Communities and Clinical Excellence, Fukushima Medical University, Fukushima, Japan

Miho Sekiguchi

Roles Conceptualization, Funding acquisition, Investigation, Resources, Supervision, Writing – review & editing

Affiliation Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan

Koji Yonemoto

Roles Data curation, Formal analysis, Methodology, Project administration

Affiliations Division of Biostatistics, School of Health Sciences, Faculty of Medicine, University of the Ryukyus, Okinawa, Japan, Advanced Medical Research Center, Faculty of Medicine, University of the Ryukyus, Okinawa Japan

Tatsuyuki Kakuma

Roles Conceptualization, Funding acquisition, Writing – review & editing

Affiliation Biostatistics Center, Kurume University, Fukuoka, Japan

Shin-ichi Konno

Roles Conceptualization, Funding acquisition, Investigation, Project administration, Resources, Supervision, Writing – review & editing

Affiliation Department of Orthopaedic Surgery, Fukushima Medical University School of Medicine, Fukushima, Japan

Competing Interests

The authors have declared that no competing interests exist.