TY - JOUR T1 - Editors' Introduction: Biologics and Regenerative Medicine in Intervertebral Disc Regeneration and Spinal Fusion JF - International Journal of Spine Surgery JO - Int J Spine Surg SP - 8 LP - 9 DO - 10.14444/8051 VL - 15 IS - s1 AU - Roger Härtl AU - Jacobus J.C. Arts AU - Hyun W. Bae Y1 - 2021/04/01 UR - http://ijssurgery.com//content/15/s1/8.abstract N2 - ER -