Corrigendum: Coexpression of HHLA2 and PD-L1 on tumor cells independently predicts the survival of spinal chordoma patients

Affiliations

• ¹ The First Affiliated Hospital, Health Management Center, Hengyang Medical School, University of South China, Hengyang, China.
• ² Department of Spine Surgery, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, China.
• ³ Shenzhen Audaque Data Technology Co., Ltd., Shenzhen, China.
• ⁴ Department of Spine Surgery, The Second Xiangya Hospital, Central South University, Changsha, China.