- Received May 17, 2012, and in revised form September 11, 2012.
- Accepted for publication September 12, 2012.
- Reprints: Zhen-yu Shen, MD, Department of Pediatrics, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong, China. E-mail: .
- This work was supported by the Science and Technology Planning Project of Guangdong Province, China (2011B031800143, 2009B060700038, 2008B060600062, and 2007B031510005).
- Supplemental digital content is available for this article. Direct URL citation appears in the printed text and is provided in the HTML and PDF versions of this article on the journal’s Web site (www.jinvestigativemed.com).
- First published December 15, 2015.
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