Text and Data Mining valid from 2019-10-22
Received: 21 January 2019
Accepted: 20 September 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: Data reported in this manuscript are available from public sources, with no element of intervention. As such, it does not need IRB approval. Hence, it did not formally go through the review of an ethics committee.
: Not Applicable.
: The authors declare that they have no competing interests. RM is a Section Editor for BMC Oral Health.