Conclusion
ADVERSE EVENT
The present study showed that alternative PRP injection provided a superior result to triamcinolone on LegVAS, and comparable results on BackVAS, ODI, adverse event, and treatment failure. The prolonged and superior effect with potentially lower rate of treatment failure supports the usage of PRP in HNP treatment. Noncommercial PRP protocol is safe, reproducible and effective in the treatment of lumbar HNP. We encourage using PRP protocol [