RT Journal Article SR Electronic 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 FD International Society for the Advancement of Spine Surgery SP 8051 DO 10.14444/8051 A1 Härtl, Roger A1 Arts, Jacobus J.C. A1 Bae, Hyun YR 2021 UL https://www.ijssurgery.com/content/early/2021/04/14/8051.abstract AB