- Correspondence to Dr Silvia Bressan, Department of Women's and Children's Health, Division of Pediatric Emergency Medicine, University of Padova, Via Giustiniani 3, Padova 35128, Italy;
- Received September 8, 2012
- Revised November 23, 2012
- Accepted February 13, 2013
- First published March 7, 2013.
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