Figure 5.

Coauthorship countries network visualization. Nine clusters between 50 coauthorship countries; Cluster 1 (Countries 14: Belgium, Bulgaria, Denmark, Finland, Greece, India, Israel, Italy, Luxembourg, Mexico, Netherlands, Romania, South Korea, Sweden; Cluster 2 (Countries 8: Burkina Faso, Cameroon, Cote Ivoire, Democratic Republic of Cango, France, Gabon, Republic of Cango, Senegal); Cluster 3 (Countries 6: England, Pakistan, Scotland, Uganda, USA, Zambia); Cluster 4 (Countries 6: Australia, Japan, Malaysia, China, Taiwan, Thailand); Cluster 5 (Countries 5: Angola, Argentina, Brazil, Peru, Portugal); Cluster 6 (Countries 4: Cuba, Russia, Spain, Switzerland); Cluster 7 (Countries 3: Canada, Iran, Kenya); Cluster 8 (Countries 3: Germany, South Africa, Tanzania); Cluster 9 (Countries 1: Nigeria).

Correct the label number...it is Figure 5 not 3