Final thematic map. The final map shows three main themes with respective sub-themes. After a first revision, there were still four themes without any hierarchy or other relationship identified among codes within themes at that stage, though one of the codes had been re-named. One of the previous main themes “Focus for simulation”, though present in each interview, was found to be an independent factor during the final analysis. Similarly, the code “Development” was found to be a common feature for several codes within the same theme rather than a stand-alone code. Therefore, these were eliminated