ACE2 and COVID-19: The full-texts of 901 articles were reviewed and 20 studies on ACE2-associated viruses and 3 studies on non-ACE2-associated viruses were included in the meta-analysis (Figure 1B).95, , , , , , , , , , , , , , , , , , , , , -117 The majority of the included COVID-19 studies were from the United States (n = 28) and China (n = 17) but other included studies were from England (n = 5), France (n = 4), Brazil (n = 3), South Korea (n = 2), Mexico (n = 2), and Canada, Sweden, Netherlands, Italy, Switzerland, Bahrain, India, United Arab Emirates, and Saudi Arabia (n = 1 each).