Effectiveness of dry needling versus a classical physiotherapy program in patients with chronic low-back pain: a single-blind, randomized, controlled trial Although the total number of subject participated was small, the minimal statistical requirement was satisfied with significance between the study group and control group. Further studies are needed to find the long lasting effect and indication, limitation of the DN to the low back pain after disc herniation. To increase confidence in the conclusions, double-blind, randomized controlled studies are needed.
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