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Experimental group.
| Group | Description |
|---|---|
| (1) Control | Naive human NP cells |
| (2) Macrophage-conditioned medium (MCM) | Potential contributing factors derived from activated macrophage-like THP-1 cells |
| (3) Degenerative conditions | Human NP cells exposed to MCM |
| (4) Degenerative conditions + phototherapy | Human NP cells exposed to MCM with PBM |
