Overview of our Collection, Selection, and Review Process (idea, concept and creation of this Figure by Leubner). Initially, the total number of retrieved results was 118,000 as far as google-scholar was concerned. Analysis was complicated by the disproportionately high number of results from google-scholar. Therefore, we decided to narrow down this initial search query to a period from 1990 up to 2016, and reduced the results from google-scholar to 60,000 this way. Compared to the other two search engines, this process was done two steps ahead. At google-scholar we excluded patents as well as citations in the initial window for our search results. Unfortunately search options are very limited, and though we retrieved at first this overwhelming number of 118,000 results!. Some keywords (e.g., anxiety, pain, fear, violence) were deliberately excluded right from the beginning. This was done right at the start of our selection/search process, to prevent a systematic distortion of retrieved results.