2025-02-212015-09-09https://dash.harvard.edu/handle/1/42715968I am an independent researcher in Brazil. By independent I mean I do not have the financial support of institutes or companies. Due to this financial constraint, we seek free sources of information, which makes the internet my most important tool. To access an article from a highly regarded researcher at Harvard University is an immeasurable benefit to my work. I'm thankful for that initiative.