Table 1.

Distribution of included studies (alphabetic order).

Five Regions of the World	45 Countries
Latin America	Brazil, Mexico, Chile, Caribbean
North America	Canada, US
Asia	China, Hong Kong Special Administrative of China, Japan, Singapore, South Korea, Taiwan, Thailand, Egypt, Iran, Saudi Arabia, Vietnam, Israel, India, Indonesia, Malaysia, Philippines, Myanmar, Cambodia
Europe	Austria, Belgium, Bulgaria, the Czech Republic, Demark, France, Germany, Greece, Italy, Ireland, Netherlands, Poland, Sweden, Switzerland, Spain, Slovenia, Russia, Romania, UK, Turkey
Oceania	Australia