**2.3 Data synthesis and analysis**

A summary of the findings of the included studies was performed, structured in the incidence/frequency of adverse effects, most prevalent adverse effects, type of intervention, type of population and other associated diseases which could influence the results (**Tables 1**–**3**). Each article was named by the author and date; they have a brief description of the intervention, the type of the adverse effect and the conclusion/resolution of the inconvenience.
