Results
Figure 1 shows the PRISMA flow diagram for selection of studies. A total
of 32 studies were included; one multicentered randomized controlled
trial, seven case-control studies and the remaining were observational
studies. Results of the quality assessment of included articles are
shown in Table 1. The studies included a total number of 3,924 patients.
Five studies evaluated only adult population4-8; ten
studies were on paediatric population (defined as under 18 years)9-18; ten studies included both adult and children19-28; eight studies did not report on the
participants’ age 29-36.