Limitations
By searching only two databases in this study, the possibility that published work relevant to the review question may have been overlooked cannot be excluded. Similarly, by focusing only on published peer-reviewed works, relevant perspectives in other works may also have been excluded. While the search terms selected were broad and relevant, given the diverse and far-reaching nature of the topic it is possible that relevant material may have been missed where this material was described using different key terms than those selected for this study.