Table 2.

Literature included in this review, by context and their references

Context	Literature describing challenges and emerging trends
Internationala	[40, 56, 61, 68, 69, 73]
Europe	[16, 62, 63, 74]
Africa	[46]
Australia	[59, 67]
Botswana	[80]
Brazil	[17, 41]
Canada	[18–20, 81]
Caribbean	[47]
Costa Rica	[72]
Finland	[21]
Germany	[33]
India	[22, 34, 48]
Indonesia	[35]
Iran	[23, 24, 49]
Ireland	[53]
Italy	[36]
Netherlands	[55]
Norway	[71]
Pacific Islands	[50]
Portugal	[25]
Spain	[65]
South Korea	[57]
South Africa	[51]
Sweden	[26, 70]
Switzerland	[37]
Syria	[52]
Tanzania	[27]
Thailand	[28]
Turkey	[64]
United Kingdom (UK)	[29, 42, 43, 75]
United States of America (USA)	[30–32, 38, 39, 44, 54, 58, 60, 66, 82, 83]

^arefers to more than one country situated in different regions including Europe, North America, Asia, and Africa