Electromagnetic navigation-assisted percutaneous endoscopic foraminoplasty and discectomy for lumbar disc herniation: technical note and preliminary results - Lin, Yongpeng; Rao, Siyuan; Chen, Bolai; Zhao, Binde; Wen, Tao; Zhou, Li; Su, Guoyi; Du, Yanxin; Li, Yongjin (Annals of Palliative Medicine; Vol 9, No 6 (November 30, 2020): Annals of Palliative Medicine, 2020)