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contributions over the years but still there is no clear consensus on a single  universal approach for data analysis.  Even though a wide variety of algorithms have been proposed over the years, very few   of them  have been widely embraced by the community at large. One of the main issues is that the analysis of smFRET data is complex and requires a significant   development effort. Currently,  each research group have reimplemented its own unpublished or closed-source versions