Statistical analysis was performed using IBM SPSS Statistics for Windows version 23.0 (IBM Corp., Armonk, NY, USA). Continuous variables are expressed as mean ± standard deviation or median/range (non-parametric variables). For correlation analysis, the Pearson correlation test was used for parametric variables and Spearman’s rank correlation test for non-parametric variables. A P value < 0.05 was considered statistically significant.
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