TY  - RPRT
TI  - Osteoinductive bone graft substitutes for spinal fusion: a basic science summary.
AU  - S C Ludwig
AU  - S D Boden
PY  - 1999
DO  - 10.1016/s0030-5898(05)70116-4
UR  - https://pubmed.ncbi.nlm.nih.gov/10471768/
ID  - 10471768
ER  -