Fig. 5.

Approval of applications. Each circle represents several applications that are approved by a particular organization. The FDA is the Food and Drug Administration of the United States. CE means CE-marked. CE marking is a certification mark that indicates conformity with health, safety and environmental protection standards for applications sold within the European Economic Area (EEA). Numbers in the intersecting parts fall under two or more categories. The ‘other’ category represents the approval bodies of Australia, Canada, Korea, Singapore and Vietnam