Li, Haisheng, Malene Laursen, Martin Lind, Changtai Sun, and Cody Bünger. 2000. “The Influence of Human Intervertebral Disc Tissue on the Metabolism of Osteoblast-Like Cells”. Acta Orthopaedica 71 (5):503-7. https://doi.org/10.1080/000164700317381216.