Received: 18 November 2019
Accepted: 27 February 2020
First Online: 12 March 2020
Ethics approval and consent to participate
: This systematic review was conducted using published data, and study authors were contacted for additional contextual information. This study was considered non-research by the University of Washington Institutional Review Board (IRB) self-determination process.
: The current research does not include details, images, or videos relating to an individual person; thus, the need for written informed consent for the publication of such details is not applicable.
: The authors declare that they have no competing interests.