Figure 4
The bar graph compares the number of studies conducted in different countries. The x-axis lists the countries, including China, India, U K, U S A, Australia, Germany, Italy, Multi-nation, Pakistan, Portugal, Taiwan, Turkey, Britain, Ghana, Greece, Israel, Malaysia, Nigeria, and United Arab Emirates. The y-axis represents the number of studies, ranging from 0 to 8. China has the highest number of studies at 7, followed by India, U K, and U S A with 4 each. Other countries have fewer studies, with values ranging from 1 to 3. The bars are vertical and ungrouped. All values are approximated.Geographical context of the studies conducted. Source: Authors' own work