Fig. 3.

The word cloud results of 2008. The representative central topic words can be separately summarized as “depression”, “tuberculosis”, “cell”, “gastric”, “treatment”, “obesity”, “pancreatitis”, “retinopathy” and “stroke”. From these figures, we can reach the result that pancreatitis, retinopathy, cataract and stroke usually appear with diabetes in the research papers of diabetes mellitus; gastric disease often appear with obesity; tuberculosis, psychological or mental disease like depression and anxiety appear with both diabetes and obesity frequently