Fig. 2From: Global output of research on epidermal parasitic skin diseases from 1967 to 2017Mapping and clustering of author keywords related to EPSD (1967–2017). The first cluster (green) includes seven keywords, the second cluster (red) includes 12 keywords, the third cluster (blue) includes six keywords, the fourth cluster (purple) includes two keywords, and the fifth cluster (light orange) includes two keywordsBack to article page