Table 3.

Studies by country

Country study undertaken (in alphabetical order)	Reference
Australia	[22]
Canada	[23]
England and Northern Ireland	[19]
Germany	[28]
Japan	[18]
Multiple	[26, 27, 31–34]
Scotland	[21]
Sub-Saharan Africa	[20, 24]
United States of America (USA)	[25, 29, 30, 35]