Reply to the letter to the editor by a questioner

Affiliations

• ¹ Division of Comprehensive Musculoskeletal Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan; Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan. Electronic address: imainorio2001@med.niigata-u.ac.jp.
• ² Division of Orthopedic Surgery, Department of Regenerative and Transplant Medicine, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
• ³ Division of Advanced Materials Science and Technology, Niigata University Graduate School of Science and Technology, Niigata, Japan.
• ⁴ Division of Orthopedic Surgery, Saiseikai Niigata Daini Hospital, Niigata, Japan.
• ⁵ Division of Orthopedic Surgery, Niigata Riko Hospital, Niigata, Japan.