Supplementary material for: LED red light can improve zoster-associated pain (ZAP) and reduce the incidence of postherpetic neuralgia (PHN): a prospective cohort study based on the new ZAP score

Supplementary Material: Detailed Methodology and Results of the Delphi Process and Analytic Hierarchy Process (AHP) for the Development of the Zoster-Associated Pain Scale (ZAPS)