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Authors
Alkulaibi, Mohammed Musid https://orcid.org/0000-0001-6902-7496
Suleiman, Ahmed Mohamed
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Article History
Received: 24 December 2018
Accepted: 20 February 2020
First Online: 11 March 2020
Compliance with Ethical Standards
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: The study was approved by the research board of the Faculty of Dentistry, University of Khartoum (Ref. 2582007).
