. 2018 Dec;18(4):873–883. doi: 10.4314/ahs.v18i4.5
© 2018 Abd El-Kader et al.
Licensee African Health Sciences. This is an Open Access article distributed under the terms of the Creative commons Attribution License (https://creativecommons.org/licenses/BY/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
