Statistical Analysis
Data analysis was done with SPSS v 23.0. Description of patients at presentation was presented as number (%) for qualitative variables and as either mean ± standard deviation or median (range) for continuous variables. The baseline characteristics were compared between various subcategories by chi-square test or Fisher exact test for categorical variables and by Kruskal-Walis or Mann Whitney test for continuous variables. P value ≤ 0.05 was taken as significant