Comment on “The State of Exosomes Research: A Global Visualized Analysis” and “Current Research Trends in Traditional Chinese Medicine Formula: A Bibliometric Review from 2000 to 2016”

Using the methods applied by Wang et al. [1], we found 7,323 publications which are very different from 4,960 in the original paper [1].To improve the author's method, appropriate keywords should be applied.A total of 7,323 English publications including 5,682 articles and 1,641 reviews were found in SCI-EXPANDED (updated on April 26, 2019) from 1994 to 2017 with keywords such as "exosomes" and "exosome" in the topic including document title, abstract, author keywords, and KeyWords Plus were taken into consideration.Chen et al. stated in 2.1.Search Strategy that "Papers published from 2000 to 2016 were tracked by the keywords "Traditional Chinese Medicine", "Traditional Chinese Medicine Formula", and "Chinese Herb Formula" for inclusion in analysis and summarization, based on their presence in the Web of Science database [2].