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Abdul Khalek A, Elkateb MA, Abdel Aziz WE, El Tantawi M.Abdul Khalek A, et al. Among authors: elkateb ma.J Clin Pediatr Dent. 2017;41(3):219-224. doi: 10.17796/1053-4628-41.3.219.J Clin Pediatr Dent. 2017.PMID: 28422591Free article.Clinical Trial.