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Khalifa N, Allen PF, Abu-bakr NH, Abdel-Rahman ME, Abdelghafar KO.Khalifa N, et al. Among authors: abu bakr nh.BMC Oral Health. 2012 Feb 24;12:5. doi: 10.1186/1472-6831-12-5.BMC Oral Health. 2012.PMID: 22364514Free PMC article.
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Khalifa N, Allen PF, Abu-bakr NH, Abdel-Rahman ME.Khalifa N, et al. Among authors: abu bakr nh.J Oral Sci. 2013;55(4):349-57. doi: 10.2334/josnusd.55.349.J Oral Sci. 2013.PMID: 24351924Free article.
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