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Goodall CA, Ayoub AF, Crawford A, Smith I, Bowman A, Koppel D, Gilchrist G.Goodall CA, et al. Among authors: koppel d.Br J Oral Maxillofac Surg. 2008 Mar;46(2):96-101. doi: 10.1016/j.bjoms.2007.11.014. Epub 2007 Dec 21.Br J Oral Maxillofac Surg. 2008.PMID: 18160192Clinical Trial.
McWilliam CA, Devlin MF, Joss SK, Koppel DA, Longman C, Ray A, Whiteford ML.McWilliam CA, et al.Clin Dysmorphol. 2011 Apr;20(2):89-91. doi: 10.1097/MCD.0b013e3283428f60.Clin Dysmorphol. 2011.PMID: 21178587No abstract available.