- Received October 4, 2011, and in revised form January 25, 2012.
- Accepted for publication January 26, 2012.
- Reprints: Aml S. Nasr, MD, Kasr El Eini School of Medicine, Cairo University, Cairo, Egypt. E-mail: .
- The authors report no conflicts of interest.
- The authors alone are responsible for the content and writing of the paper.
- No financial support was received for this work.
- First published December 15, 2015.
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