- Correspondence to Dra Maria Luisa Herreros Fernández, Pediatrics Department, University Infanta Sofía Hospital, Paseo de Europa, 34, San Sebastián de Los Reyes, Madrid 28702, Spain;
- Received March 11, 2012
- Revised August 30, 2012
- Accepted October 14, 2012
- First published November 21, 2012.
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