Frequency based on age group
Patients were divided into 4 age groups including: Infants (0_2 years old), young children (2_6 years old), children (6_12 years old) and adolescents (12_18 years old). Frequency and percentage of these groups are respectively demonstrated in Fig. 2. As seen in the figure, children have the highest and adolescents have the lowest frequency. Additionally, the average age of the patients were 6.5 years with a minimum age of 4 months and a maximum age of 16 years.