PT - JOURNAL ARTICLE AU - Roger Härtl AU - Jacobus J.C. Arts AU - Hyun Bae TI - Editors' Introduction: Biologics and Regenerative Medicine in Intervertebral Disc Regeneration and Spinal Fusion AID - 10.14444/8051 DP - 2021 Apr 15 TA - International Journal of Spine Surgery PG - 8051 4099 - http://ijssurgery.com//content/early/2021/04/14/8051.short 4100 - http://ijssurgery.com//content/early/2021/04/14/8051.full