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Table 1 The inclusion criteria

From: Effectiveness and safety of low-level laser therapy in diabetic peripheral neuropathy: a protocol for a systematic review and meta-analysis

  Inclusion criteria
Study design RCTs
Participants Adults (older than 18 years) with a clinically confirmed diagnosis of DPN
Interventions Low-level laser therapy
Comparisons Sham LLLT, no treatment, active conventional medical treatment
Outcomes At least one of the following outcomes: NCV, clinical scores that assess neurological function and related symptoms, quality of life scales, pain assessment tools