 Regarding calculating the percentage, I am not sure that\'s appropriate or informative either. The percentage is out of the total number of labeled cells, not the likelihood of a certain type RGCs projecting to one structure over the other. Again using cluster 0 as an example, the 0 vs. 0 difference (\# of labeled cells) indicate that these cells are more than twice likely project to Pbg, from the RGCs\' perspective in terms of \"projection logic\", but not quite the 0 times difference as indicated by the percentages. Additionally, the authors acknowledge that the labeled cells in LP experiments were consistently more than in the Pbg experiments, and that this could be due to the fact that Pbg was difficult to target (Subsection "Retrograde transsynaptic 