Fig. 2From: Efficacy and safety of the extracorporeal shockwave therapy in patients with postherpetic neuralgia: study protocol of a randomized controlled trialStandard Protocol Items: Recommendation for Interventional Trials (SPIRIT) schedule of enrollment, interventions, and assessments. ESWT, extracorporeal shockwave therapy; VAS, visual analogue scale; SF-36, 36-Item Short-Form Health Survey; SAS, Self-Rating Anxiety Scale; SDS, Self-Rating Depression Scale; PSQI, Pittsburgh Sleep Quality IndexBack to article page