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Financial & competing interests disclosure
L Gao is employed by School of Medicine, Yangzhou University, Jiangsu, China. H Koo is employed by School of Dental Medicine, University of Pennsylvania, Pennsylvania, USA. The work is supported by the International Association for Dental Research Innovation in Oral Care Award, the National Science Foundation (NSF) EFRI-1137186 and the National Institutes of Health/National Institute of Dental and Craniofacial Research (NIH/NIDCR) NIH R01 DE018023 and DE025848. The authors have no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.
No writing assistance was utilized in the production of this manuscript.