Text and Data Mining valid from 2018-08-13
Received: 1 April 2017
Accepted: 30 July 2018
First Online: 13 August 2018
Ethics approval and consent to participate
: In all cases, written informed consent was obtained from the guardians of the patients after explaining the detailed treatment protocol as per the patient information sheet. The study design and clinical procedures were performed in accordance with the Helsinki Declaration (revised in 2008) and were approved by the Ethics Committee of the School and Hospital of Stomatology, Fujian Medical University.
: Not applicable.
: The authors declare that they have no competing interests.
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