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Al-Safi SA, Ayoub NM, Al-Doghim I, Aboul-Enein FH.Al-Safi SA, et al. Among authors: aboul enein fh.Curr Drug Deliv. 2011 Nov;8(6):595-9. doi: 10.2174/156720111797635496.Curr Drug Deliv. 2011.PMID: 21696359Clinical Trial.