Author Correction: The number of osteoclasts in a biopsy specimen can predict the efficacy of neoadjuvant chemotherapy for primary osteosarcoma. - Araki Y; Yamamoto N; Hayashi K; Takeuchi A; Miwa S; Igarashi K; Higuchi T; Abe K; Taniguchi Y; Yonezawa H; Morinaga S; Asano Y; et al. (Scientific reports, 2021)