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. 2023 Apr 14;24:295. doi: 10.1186/s12891-023-06393-y

Fig. 1.

Fig. 1

Photographs of the intraoperative scene. A Arrangement of the incisions. ▲A viewing portal.●A working portal. ■Percutaneous pedicle screw. B Intraoperative view of biportal endoscopic spinal surgery