- Correspondence to Dr Enrico Valerio, Department of Woman and Child Health, Medical School, University of Padua, Via Giustiniani, 3, Padova (PD) 35128, Italy;
- Received May 24, 2015
- Revised June 29, 2015
- Accepted July 4, 2015
- First published July 22, 2015.
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