AUTHOR=Ge Meng , Zhu Fangbing , Du Weibin , Ye Zhengcong , Xiong Zhenfei , Zhang Lukai , Zhou Hua , Yang Jun TITLE=Hidden blood loss and risk factors after percutaneous endoscopic transforaminal lumbar interbody fusion JOURNAL=Frontiers in Surgery VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2025.1490038 DOI=10.3389/fsurg.2025.1490038 ISSN=2296-875X