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Helal R, El-Khawaga G, El-Gilany AH.Helal R, et al.Osong Public Health Res Perspect. 2018 Jan;9(1):25-31. doi: 10.24171/j.phrp.2018.9.1.05.Osong Public Health Res Perspect. 2018.PMID: 29503802Free PMC article.
Helal RM, Abou-ElWafa HS.Helal RM, et al.J Environ Public Health. 2017;2017:9145193. doi: 10.1155/2017/9145193. Epub 2017 Apr 5.J Environ Public Health. 2017.PMID: 28479921Free PMC article.
Eladawi N, Helal R, Niazy NA, Abdelsalam S.Eladawi N, et al. Among authors: helal r.Chin Med J (Engl). 2018 Jan 5;131(1):50-55. doi: 10.4103/0366-6999.221270.Chin Med J (Engl). 2018.PMID: 29271380Free PMC article.
Al-Dhamari I, Helal R, Abdelaziz T, Waldeck S, Paulus D.Al-Dhamari I, et al. Among authors: helal r.Cochlear Implants Int. 2023 Nov 3:1-13. doi: 10.1080/14670100.2023.2274199. Online ahead of print.Cochlear Implants Int. 2023.PMID: 37922404