| Value | Category | 
                                    
                    
                        | 1 | si | 
                                    
                    
                        | 2 | no | 
                                    
                    
                        | 3 | farmaceútico/farmacia | 
                                    
                    
                        | 4 | familiar/amigo/vecino | 
                                    
                    
                        | 9 | sin información | 
                                    
                    
                        | Sysmiss |  | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.