coded_variables_literature review = it is the dataset that was used to plot all the different variables in R (one variable equals to one of the 18 questions of the review)
                                    using the script plotting_coded_variables
reference list = it contains the list of all of the papers that were found using the search terms (on webofscience) that are indicated in the additional file of the scoping review, 
                 it includes both relevant and non relevant papers
plotting_coded_variables = script plotting all of the variables used in the scoping review