Table 2.

Inclusion and exclusion criteria.

Inclusion Criteria	Exclusion Criteria
•Non-specific low back pain •At least 3 weeks duration of symptoms •NSAIDs treatment washout period of 1 weeks •VAS pain score >3 •Age greater than 18 years	•Radicular pain or serious spinal pathology •Previous spinal surgery intervention •Spinal infection •Spinal metastasis or primary malignant tumor •Spondylolisthesis •Violent spinal trauma •VAS Pain score <4 •Significant coagulation disturbance •NSAIDs hypersensitivity