VEGFA and endophthalmitis: For instance, clusters #4 (intravitreal injection) and #7 (intravitreal anti-vascular endothelial growth factor injection) in the co-cited cluster analysis (Figure 5A) are actually both about endophthalmitis caused by intravitreal injection of anti-VEGF, which are contiguous on the timeline (Figure 5B) but are grouped into two separate clusters.