Statistical Analysis Plan All analyses will be performed with the Statistical Package for Social Sciences version 22.0 (IBM, Armonk, NY, USA). As this is not a randomized study, patient baseline characteristics will be compared between the Steroids and No Steroids groups. Distribution normality will be tested by Kolmogorov-Smirnov test. Dichotomous and categorical variables will be compared by a two-sided chi-square or Fisher's exact test. Continuous variables will be compared by a two-tailed, independent samples t test or Mann-Whitney exact U test.