Table 2 Countries and related studies

Austria

[10, 21]

2

Brazil

[22, 23]

2

Bulgaria

[10, 24]

2

Canada

[25]

1

China

[26]

1

Costa Rica

[27]

1

Cuba

[28],

1

Cyprus

[10, 29]

2

Czech Republic

[10]

1

Denmark

[10]

1

England

[10, 30,31,32,33],

5

Estonia

[10]

1

Finland

[34]

1

France

[10]

1

Greece

[5, 6, 10, 35,36,37,38,39,40,41,42,43,44,45],

14

Germany

[46, 47]

2

Hungary

[10]

1

Iran

[48,49,50,51,52,53,54,55,56,57,58,59]

11

Iraq

[60, 61]

2

Ireland

[10, 62, 63]

3

Italy

[10, 64],

2

Latvia

[10]

1

Lithuania

[10]

1

Luxemburg

[10]

1

Malta

[10]

1

Netherland

[10, 30]

2

Norway

[30]

1

Poland

[10]

1

Portugal

[10, 30, 65]

3

Romania

[10]

1

Slovenia

[10]

1

Slovakia

[10]

1

Spain

[10, 46, 47, 66,67,68,69,70,71,72,73,74]

12

Sweden

[30]

1

Tanzania

[75]

1

United States

[76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96]

22