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Table 1 Study eligibility criteria

From: Effects of non-pharmacological interventions on inflammatory biomarker expression in patients with fibromyalgia: a systematic review

  Inclusion criteria Exclusion criteria
Participants Fibromyalgia patients (FM) or FM and a healthy population Patients with other diseases, mixed types of patients (i.e., FM patients with other disorders), only a healthy population
No restrictions on the number of participants and the diagnostic procedures were applied
Biomarkers Cytokines, neuropeptides and CRP Other biomarkers
Interventions Non-pharmacological interventions were eligible Mixed or blended non-pharmacological interventions, only pharmacological interventions
Outcome At least one biomarker (cytokine or neuropeptide or CRP) outcome Studies in which biomarkers were used as predictors to identify the participants were excluded
Study design RCTs, Non-RCTs  
Publications Published in English, French or Spanish and as full-text articles in peer-reviewed scientific journals from January 1990 to March 2015 Published in other languages and as reviews, case reports or letters
  1. CRP C-reactive protein, Non-RCTs non-randomized controlled trials, RCTs randomized controlled trials