... participated in the design of the study, performed the statistical analysis and drafted the manuscript. EZ, CM, TC, EF, participated in the design of the study, collected data and revised the drafted ... participated in the design of the study and revised the drafted the manuscript. AC conceived and coordinated the study, participated in its design and drafted the manu-script. All authors read and approved ... have influ-enced the differences in the results of these studies suchTable 3: Comparison of the differences between background and peak pain intensities (Δ) for VRS and NRS on the 158 patients...