. 2021 Jul 12;9:674899. doi: 10.3389/fped.2021.674899
Copyright © 2021 Shaiba, Altirkawi, Hadid, Alsubaie, Alharbi, Alkhalaf, Alharbi, Alruqaie, Alzomor, Almughaileth, Alyousef and Shah.
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Figure 1.
Flow chart shows the numbers of individuals at each stage of study.