aDepartment of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan
bSpine Center, Hakodate Central General Hospital, Hakodate, Hokkaido, Japan
cDepartment of Spine Surgery, Hokkaido Orthopedic Memorial Hospital, Sapporo, Hokkaido, Japan
dDepartment of Orthopedic Surgery, Hokkaido Spinal Cord Injury Center, Bibai, Hokkaido, Japan.
Address correspondence and reprint requests to Masahiko Takahata, MD, Department of Orthopaedic Surgery, Hokkaido University Graduate School of Medicine, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido 060-8638, Japan; E-mail: [email protected]
Received 12 June, 2020
Revised 17 November, 2020
Accepted 19 November, 2020
The manuscript submitted does not contain information about medical device(s)/drug(s).
No funds were received in support of this work.
No relevant financial activities outside the submitted work.
